diff --git a/.idea/misc.xml b/.idea/misc.xml
index c2c534b..705eb91 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -7,6 +7,8 @@
         <entry key="app/src/main/res/layout/activity_login.xml" value="0.37083333333333335" />
         <entry key="app/src/main/res/layout/activity_main.xml" value="0.35625" />
         <entry key="app/src/main/res/layout/activity_sign_up.xml" value="0.4375" />
+        <entry key="app/src/main/res/layout/user_layout.xml" value="0.25" />
+        <entry key="app/src/main/res/menu/main_menu.xml" value="0.4375" />
       </map>
     </option>
   </component>
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 94a25f7..609b4fa 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GitSharedSettings">
+    <option name="synchronizeBranchProtectionRules" value="false" />
+  </component>
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
   </component>
diff --git a/app/build.gradle b/app/build.gradle
index ed68a6d..f098d63 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -42,6 +42,7 @@ dependencies {
     implementation 'com.google.android.material:material:1.6.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
     implementation 'com.google.firebase:firebase-auth:19.2.0'
+    implementation 'com.google.firebase:firebase-database-ktx:20.1.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
diff --git a/app/google-services.json b/app/google-services.json
index 711de57..4b861c1 100644
--- a/app/google-services.json
+++ b/app/google-services.json
@@ -1,6 +1,7 @@
 {
   "project_info": {
     "project_number": "233851758467",
+    "firebase_url": "https://chatapplication-4eb49-default-rtdb.europe-west1.firebasedatabase.app",
     "project_id": "chatapplication-4eb49",
     "storage_bucket": "chatapplication-4eb49.appspot.com"
   },
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index dfb7078..6327779 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -14,11 +14,15 @@
         android:theme="@style/Theme.ChatApplication"
         tools:targetApi="31">
         <activity
-            android:name=".SignUp"
+            android:name=".ChatActivity"
             android:exported="false" />
+        <activity
+            android:name=".SignUp"
+            android:exported="false"
+            android:parentActivityName=".LogIn" />
         <activity
             android:name=".LogIn"
-            android:exported="true" >
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
@@ -27,7 +31,7 @@
         </activity>
         <activity
             android:name=".MainActivity"
-            android:exported="false"/>
+            android:exported="false" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/ChatActivity.kt b/app/src/main/java/com/lsm/chatapplication/ChatActivity.kt
new file mode 100644
index 0000000..ad902b2
--- /dev/null
+++ b/app/src/main/java/com/lsm/chatapplication/ChatActivity.kt
@@ -0,0 +1,11 @@
+package com.lsm.chatapplication
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class ChatActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_chat)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/LogIn.kt b/app/src/main/java/com/lsm/chatapplication/LogIn.kt
index 2b04bc9..91fd34c 100644
--- a/app/src/main/java/com/lsm/chatapplication/LogIn.kt
+++ b/app/src/main/java/com/lsm/chatapplication/LogIn.kt
@@ -3,6 +3,7 @@ package com.lsm.chatapplication
 import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.Toast
 import com.google.firebase.auth.FirebaseAuth
 import com.lsm.chatapplication.databinding.ActivityLogInBinding
 
@@ -17,6 +18,8 @@ class LogIn : AppCompatActivity() {
         val view = binding.root
         setContentView(view)
 
+//        supportActionBar?.hide()
+
         mAuth = FirebaseAuth.getInstance()
 
         binding.logInBtn.setOnClickListener{
@@ -31,6 +34,17 @@ class LogIn : AppCompatActivity() {
         }
     }
     private fun logIn(email: String, password: String){
-
+        mAuth.signInWithEmailAndPassword(email, password)
+            .addOnCompleteListener(this) { task ->
+                if (task.isSuccessful) {
+                    // Move to home
+                    val intent = Intent(this@LogIn, MainActivity::class.java)
+                    finish()
+                    startActivity(intent)
+                } else {
+                    // Logging error message
+                    Toast.makeText(this@LogIn,"User doest not exits",Toast.LENGTH_SHORT).show()
+                }
+            }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/MainActivity.kt b/app/src/main/java/com/lsm/chatapplication/MainActivity.kt
index 778444b..0ff0973 100644
--- a/app/src/main/java/com/lsm/chatapplication/MainActivity.kt
+++ b/app/src/main/java/com/lsm/chatapplication/MainActivity.kt
@@ -1,11 +1,82 @@
 package com.lsm.chatapplication
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.google.firebase.auth.FirebaseAuth
+import com.google.firebase.database.DataSnapshot
+import com.google.firebase.database.DatabaseError
+import com.google.firebase.database.ValueEventListener
+import com.google.firebase.database.ktx.database
+import com.google.firebase.ktx.Firebase
+import com.lsm.chatapplication.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityMainBinding
+    private lateinit var userList: ArrayList<User>
+    private lateinit var adapter: UserAdapter
+    private lateinit var mAuth: FirebaseAuth
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        mAuth = FirebaseAuth.getInstance()
+
+        userList = ArrayList()
+        adapter = UserAdapter()
+//        adapter.submitList(userList)
+
+        binding.userRecyclerView.layoutManager = LinearLayoutManager(this)
+        binding.userRecyclerView.adapter = adapter
+
+        readUsersFromDatabase()
+    }
+
+    private fun readUsersFromDatabase(){
+        val mDbRef = Firebase.database("https://chatapplication-4eb49-default-rtdb.europe-west1.firebasedatabase.app/").reference
+        mDbRef.child("user").addValueEventListener(object: ValueEventListener{
+            override fun onDataChange(snapshot: DataSnapshot) {
+
+                userList.clear()
+//                for(postSnapshot in snapshot.children){
+//                    val currentUser = postSnapshot.getValue(User::class.java)
+//                    userList.add(currentUser!!)
+//                }
+                snapshot.children.forEach {
+                    val currentUser = it.getValue(User::class.java)
+                    userList.add(currentUser!!)
+                }
+                userList.removeAll(
+                    userList.filter{it.uid == mAuth.currentUser?.uid}.toSet()
+                )
+//                userList.removeIf{it.uid == mAuth.currentUser?.uid}
+                adapter.submitList(userList)
+            }
+
+            override fun onCancelled(error: DatabaseError) {
+                TODO("Not yet implemented")
+            }
+
+        })
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.main_menu,menu)
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        if(item.itemId == R.id.Logout){
+            mAuth.signOut()
+            finish()
+            val intent = Intent(this, LogIn::class.java)
+            startActivity(intent)
+        }
+        return true
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/SignUp.kt b/app/src/main/java/com/lsm/chatapplication/SignUp.kt
index 8c41d01..7b90991 100644
--- a/app/src/main/java/com/lsm/chatapplication/SignUp.kt
+++ b/app/src/main/java/com/lsm/chatapplication/SignUp.kt
@@ -1,13 +1,20 @@
 package com.lsm.chatapplication
 
+import android.content.Intent
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.widget.Toast
 import com.google.firebase.auth.FirebaseAuth
+import com.google.firebase.database.DatabaseReference
+import com.google.firebase.database.FirebaseDatabase
+import com.google.firebase.database.ktx.database
+import com.google.firebase.ktx.Firebase
 import com.lsm.chatapplication.databinding.ActivitySignUpBinding
 
 class SignUp : AppCompatActivity() {
     private lateinit var binding: ActivitySignUpBinding
     private lateinit var mAuth: FirebaseAuth
+//    private lateinit var mDbRef: DatabaseReference
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -15,16 +22,37 @@ class SignUp : AppCompatActivity() {
         val view = binding.root
         setContentView(view)
 
+//        supportActionBar?.hide()
+
         mAuth = FirebaseAuth.getInstance()
+//        mDbRef = Firebase.database("https://chatapplication-4eb49-default-rtdb.europe-west1.firebasedatabase.app/").reference
 
         binding.signUpBtn.setOnClickListener{
             val usrName = binding.edtUserName.text.toString()
             val email = binding.edtEmail.text.toString()
             val password = binding.edtPassword.text.toString()
-            signUp(email,password)
+            signUp(usrName, email,password)
         }
     }
-    private fun signUp(email: String, password: String){
+    private fun signUp(name:String, email: String, password: String){
+        mAuth.createUserWithEmailAndPassword(email, password)
+            .addOnCompleteListener(this) { task ->
+                if (task.isSuccessful) {
+                    // Jumping to home
+                    addUserToDatabase(name, email, mAuth.currentUser?.uid!!)
+                    val intent = Intent(this@SignUp,MainActivity::class.java)
+                    finish()
+                    startActivity(intent)
+                } else {
+                    // Account creation error message
+                    Toast.makeText(this@SignUp,task.exception?.toString(),Toast.LENGTH_LONG).show()
+                    //Toast.makeText(this@SignUp,"Some error occurred",Toast.LENGTH_SHORT).show()
+                }
+            }
+    }
 
+    private fun addUserToDatabase(name: String, email: String, uid: String){
+        val mDbRef = Firebase.database("https://chatapplication-4eb49-default-rtdb.europe-west1.firebasedatabase.app/").reference
+        mDbRef.child("user").child(uid).setValue(User(name,email,uid))
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/User.kt b/app/src/main/java/com/lsm/chatapplication/User.kt
new file mode 100644
index 0000000..0d1316c
--- /dev/null
+++ b/app/src/main/java/com/lsm/chatapplication/User.kt
@@ -0,0 +1,17 @@
+package com.lsm.chatapplication
+
+class User (var name: String?, var email: String?, var uid: String?){
+
+    constructor() : this(null,null,null) {}
+
+    override fun equals(other: Any?): Boolean {
+        return super.equals(other)
+    }
+
+    override fun hashCode(): Int {
+        var result = name?.hashCode() ?: 0
+        result = 31 * result + (email?.hashCode() ?: 0)
+        result = 31 * result + (uid?.hashCode() ?: 0)
+        return result
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/lsm/chatapplication/UserAdapter.kt b/app/src/main/java/com/lsm/chatapplication/UserAdapter.kt
new file mode 100644
index 0000000..c3475ad
--- /dev/null
+++ b/app/src/main/java/com/lsm/chatapplication/UserAdapter.kt
@@ -0,0 +1,53 @@
+package com.lsm.chatapplication
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import androidx.recyclerview.widget.RecyclerView
+import com.lsm.chatapplication.databinding.UserLayoutBinding
+
+//class UserAdapter(val userList: ArrayList<User>):
+//    RecyclerView.Adapter<UserAdapter.UserViewHolder>() {
+//
+//    class UserViewHolder(val binding: UserLayoutBinding): RecyclerView.ViewHolder(binding.root)
+//
+//    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): UserViewHolder {
+//        return UserViewHolder(UserLayoutBinding.inflate(LayoutInflater.from(parent.context), parent, false))
+//    }
+//
+//    override fun onBindViewHolder(holder: UserViewHolder, position: Int) {
+//        val currentUser = userList[position]
+//        holder.binding.userName.text = currentUser.name
+//    }
+//
+//    override fun getItemCount(): Int {
+//        return userList.size
+//    }
+//}
+class UserAdapter():
+        ListAdapter<User,UserAdapter.UserViewHolder>(TaskDiffCallBack()){
+
+    class TaskDiffCallBack: DiffUtil.ItemCallback<User>() {
+        override fun areItemsTheSame(oldItem: User, newItem: User): Boolean {
+            return oldItem.uid == newItem.uid
+        }
+
+        override fun areContentsTheSame(oldItem: User, newItem: User): Boolean {
+            return oldItem == newItem
+        }
+    }
+
+    class UserViewHolder(val binding: UserLayoutBinding): RecyclerView.ViewHolder(binding.root)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): UserViewHolder {
+        return UserViewHolder(UserLayoutBinding.inflate(LayoutInflater.from(parent.context), parent, false))
+    }
+
+    override fun onBindViewHolder(holder: UserViewHolder, position: Int) {
+        val currentUser = getItem(position)
+        holder.binding.userName.text = currentUser.name
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_chat.xml b/app/src/main/res/layout/activity_chat.xml
new file mode 100644
index 0000000..99d07ff
--- /dev/null
+++ b/app/src/main/res/layout/activity_chat.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ChatActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 0b15a20..ae9993c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,4 +6,13 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/user_recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:listitem="@layout/user_layout"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/user_layout.xml b/app/src/main/res/layout/user_layout.xml
new file mode 100644
index 0000000..d8216f3
--- /dev/null
+++ b/app/src/main/res/layout/user_layout.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <androidx.cardview.widget.CardView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        app:cardBackgroundColor="@color/white"
+        app:cardCornerRadius="10dp"
+        app:cardElevation="4dp"
+        app:contentPadding="10dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <androidx.constraintlayout.widget.ConstraintLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <TextView
+                android:id="@+id/user_name"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="24dp"
+                android:layout_marginTop="8dp"
+                android:layout_marginBottom="8dp"
+                android:text="TextView"
+                android:textSize="20sp"
+                android:textStyle="bold"
+                app:layout_constraintBottom_toBottomOf="parent"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintHorizontal_bias="0.0"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent" />
+        </androidx.constraintlayout.widget.ConstraintLayout>
+
+    </androidx.cardview.widget.CardView>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/menu/main_menu.xml b/app/src/main/res/menu/main_menu.xml
new file mode 100644
index 0000000..0edb90f
--- /dev/null
+++ b/app/src/main/res/menu/main_menu.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/Logout"
+        android:title="@string/logout_menu" />
+</menu>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2a79815..3ad994b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -6,4 +6,5 @@
     <string name="user_name_hint">User Name</string>
     <string name="sign_up_btn_text">Create new account</string>
     <string name="options_separator_text">Or</string>
+    <string name="logout_menu">Log Out</string>
 </resources>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 39215c9..73ffe6e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     dependencies {
-        classpath 'com.google.gms:google-services:4.3.13'
+        classpath 'com.google.gms:google-services:4.3.14'
     }
 }