diff --git a/README.md b/README.md
deleted file mode 100644
index 5b501b5..0000000
--- a/README.md
+++ /dev/null
@@ -1 +0,0 @@
-### Book exchange application API
diff --git a/build.gradle b/build.gradle
deleted file mode 100644
index 8e92312..0000000
--- a/build.gradle
+++ /dev/null
@@ -1,44 +0,0 @@
-plugins {
-	id 'org.springframework.boot' version '2.2.1.RELEASE'
-	id 'io.spring.dependency-management' version '1.0.8.RELEASE'
-	id 'java'
-}
-
-group = 'com.fnecan.study'
-version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '1.8'
-
-
-repositories {
-	mavenCentral()
-	jcenter()
-}
-
-apply plugin: 'groovy'
-
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
-
-dependencies {
-	implementation 'org.springframework.boot:spring-boot-starter-data-mongodb'
-	implementation 'org.springframework.boot:spring-boot-starter-security'
-	implementation 'org.springframework.boot:spring-boot-starter-web'
-	compile "org.springframework.boot:spring-boot-starter-security:*"
-	compile "org.springframework.security:spring-security-config:*"
-	testImplementation('org.springframework.boot:spring-boot-starter-test') {
-		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
-	}
-	testImplementation 'org.springframework.security:spring-security-test'
-	testCompile (
-			'org.codehaus.groovy:groovy-all:2.4.4',
-			'org.spockframework:spock-core:1.0-groovy-2.4'
-	)
-
-	testRuntime(
-			'com.athaydes:spock-reports:1.2.7'
-	)
-}
-
-test {
-	useJUnitPlatform()
-}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
deleted file mode 100644
index 29953ea..0000000
Binary files a/gradle/wrapper/gradle-wrapper.jar and /dev/null differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index 5028f28..0000000
--- a/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,5 +0,0 @@
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
-zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
deleted file mode 100755
index cccdd3d..0000000
--- a/gradlew
+++ /dev/null
@@ -1,172 +0,0 @@
-#!/usr/bin/env sh
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=$((i+1))
-    done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=$(save "$@")
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
-fi
-
-exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
deleted file mode 100644
index e95643d..0000000
--- a/gradlew.bat
+++ /dev/null
@@ -1,84 +0,0 @@
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
diff --git a/settings.gradle b/settings.gradle
deleted file mode 100644
index 6bb6fc7..0000000
--- a/settings.gradle
+++ /dev/null
@@ -1 +0,0 @@
-rootProject.name = 'bookapi'
diff --git a/src/main/java/com/fnecan/study/bookapi/BookapiApplication.java b/src/main/java/com/fnecan/study/bookapi/BookapiApplication.java
deleted file mode 100644
index cab48c5..0000000
--- a/src/main/java/com/fnecan/study/bookapi/BookapiApplication.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.fnecan.study.bookapi;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-@SpringBootApplication
-public class BookapiApplication {
-
-	public static void main(String[] args) {
-		SpringApplication.run(BookapiApplication.class, args);
-	}
-
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/api/BookController.java b/src/main/java/com/fnecan/study/bookapi/api/BookController.java
deleted file mode 100644
index 3fdf5ad..0000000
--- a/src/main/java/com/fnecan/study/bookapi/api/BookController.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package com.fnecan.study.bookapi.api;
-
-import com.fnecan.study.bookapi.service.BookService;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.DeleteMapping;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.RequestHeader;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-@RequestMapping("/api/v1/books")
-public class BookController {
-
-    @Autowired
-    BookService bookService;
-
-    @GetMapping
-    public ResponseEntity getBooksForUser(@RequestHeader("userId") String userId){
-        return ResponseEntity.ok(
-                bookService.getBooksForUser(userId)
-        );
-    }
-
-    @GetMapping("/{bookId}")
-    public ResponseEntity getBookDetails(
-            @RequestHeader("userId") String userId,
-            @PathVariable("bookId") String bookId
-    ){
-        return ResponseEntity.ok(
-                bookService.getBookDetails(userId, bookId)
-        );
-    }
-
-    @DeleteMapping("/{bookId}")
-    public ResponseEntity removeBook(
-            @RequestHeader("userId") String userId,
-            @PathVariable("bookId") String bookId
-    ){
-        return ResponseEntity.ok(
-                bookService.removeBook(userId, bookId)
-        );
-    }
-
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/api/MessageController.java b/src/main/java/com/fnecan/study/bookapi/api/MessageController.java
deleted file mode 100644
index f82b3f7..0000000
--- a/src/main/java/com/fnecan/study/bookapi/api/MessageController.java
+++ /dev/null
@@ -1,34 +0,0 @@
-package com.fnecan.study.bookapi.api;
-
-import com.fnecan.study.bookapi.service.MessageService;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.RequestHeader;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-import java.util.List;
-
-@RestController
-@RequestMapping("/api/v1/conversation")
-public class MessageController{
-
-    MessageService messageService;
-
-    @Autowired
-    public MessageController(MessageService messageService) {
-        this.messageService = messageService;
-    }
-
-    @GetMapping("/getMessages/{conversationId}")
-    public ResponseEntity<?> getMessageForUser(
-            @RequestHeader("userId") String userId,
-            @PathVariable("conversationId") String conversationId
-    ) {
-        List conversationMessagesForUser = messageService.getMessagesForUserAndConversation(userId, conversationId);
-        return ResponseEntity.ok(conversationMessagesForUser);
-    }
-
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/config/SecurityConfiguration.java b/src/main/java/com/fnecan/study/bookapi/config/SecurityConfiguration.java
deleted file mode 100644
index 133df73..0000000
--- a/src/main/java/com/fnecan/study/bookapi/config/SecurityConfiguration.java
+++ /dev/null
@@ -1,38 +0,0 @@
-package com.fnecan.study.bookapi.config;
-
-import com.fnecan.study.bookapi.service.UserService;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
-import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
-import org.springframework.security.crypto.password.PasswordEncoder;
-
-@Configuration
-@EnableConfigurationProperties
-public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
-    @Autowired
-    UserService userService;
-
-    @Override
-    protected void configure(HttpSecurity http) throws Exception {
-        http
-                .csrf().disable()
-                .authorizeRequests().anyRequest().authenticated()
-                .and().httpBasic()
-                .and().sessionManagement().disable();
-    }
-
-    @Bean
-    public PasswordEncoder passwordEncoder() {
-        return new BCryptPasswordEncoder();
-    }
-
-    @Override
-    public void configure(AuthenticationManagerBuilder builder) throws Exception {
-        builder.userDetailsService(userService);
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/doman/Genre.java b/src/main/java/com/fnecan/study/bookapi/doman/Genre.java
deleted file mode 100644
index a301fd9..0000000
--- a/src/main/java/com/fnecan/study/bookapi/doman/Genre.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.fnecan.study.bookapi.doman;
-
-public enum Genre {
-    HORROR,
-    SCIFI,
-    DRAMA
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/model/BookDocument.java b/src/main/java/com/fnecan/study/bookapi/model/BookDocument.java
deleted file mode 100644
index 297765d..0000000
--- a/src/main/java/com/fnecan/study/bookapi/model/BookDocument.java
+++ /dev/null
@@ -1,54 +0,0 @@
-package com.fnecan.study.bookapi.model;
-
-import com.fnecan.study.bookapi.doman.Genre;
-import org.springframework.data.annotation.Id;
-import org.springframework.data.mongodb.core.mapping.Document;
-
-@Document
-public class BookDocument {
-    @Id
-    private String id;
-    private String author;
-    private String isbn;
-    private Genre genre;
-    private String userId;
-
-    public BookDocument(String author, String isbn, Genre genre, String userId) {
-        this.author = author;
-        this.isbn = isbn;
-        this.genre = genre;
-        this.userId = userId;
-    }
-
-    public String getAuthor() {
-        return author;
-    }
-
-    public void setAuthor(String author) {
-        this.author = author;
-    }
-
-    public String getIsbn() {
-        return isbn;
-    }
-
-    public void setIsbn(String isbn) {
-        this.isbn = isbn;
-    }
-
-    public Genre getGenre() {
-        return genre;
-    }
-
-    public void setGenre(Genre genre) {
-        this.genre = genre;
-    }
-
-    public String getUserId() {
-        return userId;
-    }
-
-    public void setUserId(String userId) {
-        this.userId = userId;
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/model/ConversationDocument.java b/src/main/java/com/fnecan/study/bookapi/model/ConversationDocument.java
deleted file mode 100644
index 8c91487..0000000
--- a/src/main/java/com/fnecan/study/bookapi/model/ConversationDocument.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.fnecan.study.bookapi.model;
-
-import org.springframework.data.annotation.Id;
-import org.springframework.data.mongodb.core.mapping.Document;
-
-@Document
-public class ConversationDocument {
-    @Id
-    String id;
-
-    ConversationDocument(){
-
-    }
-
-    public String getId() {
-        return id;
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/model/MessageDocument.java b/src/main/java/com/fnecan/study/bookapi/model/MessageDocument.java
deleted file mode 100644
index c7915c6..0000000
--- a/src/main/java/com/fnecan/study/bookapi/model/MessageDocument.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package com.fnecan.study.bookapi.model;
-
-import org.springframework.data.annotation.Id;
-import org.springframework.data.mongodb.core.mapping.Document;
-
-@Document
-public class MessageDocument {
-    @Id
-    private String id;
-    private String conversationId;
-    private String authorId;
-    private String recipientId;
-
-    public MessageDocument(String conversationId, String authorId, String recipientId) {
-        this.conversationId = conversationId;
-        this.authorId = authorId;
-        this.recipientId = recipientId;
-    }
-
-    public String getConversationId() {
-        return conversationId;
-    }
-
-    public void setConversationId(String conversationId) {
-        this.conversationId = conversationId;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getAuthorId() {
-        return authorId;
-    }
-
-    public void setAuthorId(String authorId) {
-        this.authorId = authorId;
-    }
-
-    public String getRecipientId() {
-        return recipientId;
-    }
-
-    public void setRecipientId(String recipientId) {
-        this.recipientId = recipientId;
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/model/UserDocument.java b/src/main/java/com/fnecan/study/bookapi/model/UserDocument.java
deleted file mode 100644
index 9af92ff..0000000
--- a/src/main/java/com/fnecan/study/bookapi/model/UserDocument.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package com.fnecan.study.bookapi.model;
-
-import org.springframework.data.annotation.Id;
-import org.springframework.data.mongodb.core.mapping.Document;
-
-public class UserDocument {
-    @Id
-    private String _id;
-
-    private String username;
-
-    public String getPassword() {
-        return password;
-    }
-
-    public void setPassword(String password) {
-        this.password = password;
-    }
-
-    private String password;
-    private String location;
-
-    public UserDocument(String username, String location) {
-        this.username = username;
-        this.location = location;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public void setUsername(String username) {
-        this.username = username;
-    }
-
-    public String getLocation() {
-        return location;
-    }
-
-    public void setLocation(String location) {
-        this.location = location;
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/BookRepository.java b/src/main/java/com/fnecan/study/bookapi/repository/BookRepository.java
deleted file mode 100644
index 88b56b5..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/BookRepository.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.BookDocument;
-import org.springframework.data.mongodb.repository.MongoRepository;
-
-import java.util.List;
-import java.util.Optional;
-
-public interface BookRepository extends MongoRepository<BookDocument, String>, BookRepositoryCustom {
-    List<BookDocument> findByUserId(String userId);
-    Optional<BookDocument> findByUserIdAndId(String userId, String bookId);
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustom.java b/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustom.java
deleted file mode 100644
index 98a306d..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustom.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.BookDocument;
-
-import java.util.Optional;
-
-public interface BookRepositoryCustom {
-    Optional<BookDocument> removeBook(String userId, String bookId);
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustomImplementation.java b/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustomImplementation.java
deleted file mode 100644
index b2e944d..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/BookRepositoryCustomImplementation.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.BookDocument;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.data.mongodb.core.MongoTemplate;
-import org.springframework.data.mongodb.core.query.Criteria;
-import org.springframework.data.mongodb.core.query.Query;
-
-import java.util.Optional;
-
-public class BookRepositoryCustomImplementation implements BookRepositoryCustom {
-
-    @Autowired
-    MongoTemplate mongoTemplate;
-
-    @Override
-    public Optional<BookDocument> removeBook(String userId, String bookId) {
-        return Optional.ofNullable(mongoTemplate.findAndRemove(
-                Query.query(
-                        Criteria.where("userId").is(userId).and("id").is(bookId)
-                ), BookDocument.class));
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/ConversationRepository.java b/src/main/java/com/fnecan/study/bookapi/repository/ConversationRepository.java
deleted file mode 100644
index 091b4eb..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/ConversationRepository.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.ConversationDocument;
-import org.springframework.data.mongodb.repository.MongoRepository;
-
-public interface ConversationRepository extends MongoRepository<ConversationDocument, String> {
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepository.java b/src/main/java/com/fnecan/study/bookapi/repository/MessageRepository.java
deleted file mode 100644
index edafc83..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepository.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.MessageDocument;
-import org.springframework.data.mongodb.repository.MongoRepository;
-import org.springframework.data.mongodb.repository.Query;
-
-import java.util.List;
-
-public interface MessageRepository extends MongoRepository<MessageDocument, String>, MessageRepositoryCustom {
-
-    @Query("{ $and: [{'conversationId': ?1} , {$or: [{ 'authorId': ?0 },{ 'recipientId': ?0 }]}] }")
-    List<MessageDocument> findMessagesForUserAndConversation(String userId, String conversationId); // TODO: Test query or create a repository implementation
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustom.java b/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustom.java
deleted file mode 100644
index a68b7ff..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustom.java
+++ /dev/null
@@ -1,11 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.MessageDocument;
-
-public interface MessageRepositoryCustom {
-    MessageDocument createMessage(
-            String message,
-            String authorId,
-            String recipientId
-    );
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustomImpl.java b/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustomImpl.java
deleted file mode 100644
index 07899e4..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/MessageRepositoryCustomImpl.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.MessageDocument;
-
-public class MessageRepositoryCustomImpl implements MessageRepositoryCustom {
-    @Override
-    public MessageDocument createMessage(String message, String authorId, String recipientId) {
-        return null;
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/repository/UserRepository.java b/src/main/java/com/fnecan/study/bookapi/repository/UserRepository.java
deleted file mode 100644
index 46d3430..0000000
--- a/src/main/java/com/fnecan/study/bookapi/repository/UserRepository.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package com.fnecan.study.bookapi.repository;
-
-import com.fnecan.study.bookapi.model.UserDocument;
-import org.springframework.data.mongodb.repository.MongoRepository;
-
-public interface UserRepository extends MongoRepository<UserDocument, String> {
-    UserDocument findByUsername(String userName);
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/service/BookService.java b/src/main/java/com/fnecan/study/bookapi/service/BookService.java
deleted file mode 100644
index bc0606d..0000000
--- a/src/main/java/com/fnecan/study/bookapi/service/BookService.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.fnecan.study.bookapi.service;
-
-import com.fnecan.study.bookapi.model.BookDocument;
-import com.fnecan.study.bookapi.repository.BookRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-
-import java.util.List;
-import java.util.Optional;
-
-@Service
-public class BookService {
-
-    @Autowired
-    BookRepository bookRepository;
-
-    public List<BookDocument> getBooksForUser(String userId) {
-        return bookRepository.findByUserId(userId);
-    }
-
-    public Optional<BookDocument> getBookDetails(String userId, String bookId) {
-        return bookRepository.findByUserIdAndId(userId, bookId);
-    }
-
-    public Optional<BookDocument> removeBook(String userId, String bookId) {
-        return bookRepository.removeBook(userId, bookId);
-    }
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/service/MessageService.java b/src/main/java/com/fnecan/study/bookapi/service/MessageService.java
deleted file mode 100644
index 4e46f42..0000000
--- a/src/main/java/com/fnecan/study/bookapi/service/MessageService.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package com.fnecan.study.bookapi.service;
-
-import com.fnecan.study.bookapi.model.MessageDocument;
-import com.fnecan.study.bookapi.repository.ConversationRepository;
-import com.fnecan.study.bookapi.repository.MessageRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-
-import java.util.List;
-
-@Service
-public class MessageService {
-
-    @Autowired
-    MessageRepository messageRepository;
-
-    @Autowired
-    ConversationRepository conversationRepository;
-
-    public List<MessageDocument> getMessagesForUserAndConversation(String userId, String conversationId) {
-        return messageRepository.findMessagesForUserAndConversation(userId, conversationId);
-    }
-
-    public MessageDocument createMessage(String message, String authorId, String recipientId) {
-        return messageRepository.createMessage(message, authorId, recipientId);
-    }
-
-}
diff --git a/src/main/java/com/fnecan/study/bookapi/service/UserService.java b/src/main/java/com/fnecan/study/bookapi/service/UserService.java
deleted file mode 100644
index 66f0e1c..0000000
--- a/src/main/java/com/fnecan/study/bookapi/service/UserService.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package com.fnecan.study.bookapi.service;
-
-import com.fnecan.study.bookapi.model.UserDocument;
-import com.fnecan.study.bookapi.repository.UserRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
-import org.springframework.security.core.userdetails.AuthenticationUserDetailsService;
-import org.springframework.security.core.userdetails.User;
-import org.springframework.security.core.userdetails.UserDetails;
-import org.springframework.security.core.userdetails.UserDetailsService;
-import org.springframework.security.core.userdetails.UsernameNotFoundException;
-import org.springframework.stereotype.Component;
-
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.List;
-import java.util.Optional;
-
-@Component
-public class UserService implements UserDetailsService {
-
-    @Autowired
-    UserRepository userRepository;
-
-    @Override
-    public UserDetails loadUserByUsername(String userName) throws UsernameNotFoundException {
-        UserDocument user = Optional.ofNullable(userRepository.findByUsername(userName))
-                .orElseThrow(() -> new UsernameNotFoundException("User not found"));
-
-        List<SimpleGrantedAuthority> authorities = Collections.singletonList(new SimpleGrantedAuthority("user"));
-
-        return new User(user.getUsername(), user.getPassword(), authorities);
-    }
-}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
deleted file mode 100644
index 8b13789..0000000
--- a/src/main/resources/application.properties
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/test/groovy/com/fnecan/study/bookapi/BookapiApplicationTests.java b/src/test/groovy/com/fnecan/study/bookapi/BookapiApplicationTests.java
deleted file mode 100644
index cd811da..0000000
--- a/src/test/groovy/com/fnecan/study/bookapi/BookapiApplicationTests.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.fnecan.study.bookapi;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class BookapiApplicationTests {
-
-	@Test
-	void contextLoads() {
-	}
-
-}
diff --git a/src/test/groovy/com/fnecan/study/bookapi/ExampleTest.groovy b/src/test/groovy/com/fnecan/study/bookapi/ExampleTest.groovy
deleted file mode 100644
index 67bfc79..0000000
--- a/src/test/groovy/com/fnecan/study/bookapi/ExampleTest.groovy
+++ /dev/null
@@ -1,15 +0,0 @@
-package com.fnecan.study.bookapi
-
-import spock.lang.Specification
-
-class ExampleTest extends Specification {
-
-    def "It should run the application" () {
-        when:
-        def a = 1;
-
-        then:
-        a == 1
-    }
-
-}