diff --git a/BackEnd/src/main/java/studycave/studycaverestservice/controller/UsosController.java b/BackEnd/src/main/java/studycave/studycaverestservice/controller/UsosController.java
index d6c3208..14c431d 100644
--- a/BackEnd/src/main/java/studycave/studycaverestservice/controller/UsosController.java
+++ b/BackEnd/src/main/java/studycave/studycaverestservice/controller/UsosController.java
@@ -2,6 +2,7 @@ package studycave.studycaverestservice.controller;
 
 import io.swagger.annotations.ApiImplicitParam;
 import io.swagger.annotations.ApiImplicitParams;
+import org.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
@@ -13,6 +14,8 @@ import org.springframework.web.bind.annotation.RestController;
 import studycave.studycaverestservice.PropertiesLoader;
 import studycave.studycaverestservice.model.user.User;
 import studycave.studycaverestservice.usos.AuthorizationService;
+import studycave.studycaverestservice.usos.TokenResponseDTO;
+import studycave.studycaverestservice.usos.UsosResponseDTO;
 
 import javax.servlet.http.HttpServletRequest;
 import java.io.IOException;
@@ -36,7 +39,7 @@ public class UsosController {
             @ApiImplicitParam(name = "oauth_token_secret", value = "User's oauth_token_secret", required = true, dataType = "string", paramType = "header"),
             @ApiImplicitParam(name = "oauth_verifier", value = "User's oauth_verifier", required = true, dataType = "string", paramType = "header")
     })
-    public ResponseEntity<String> authorize(HttpServletRequest request) {
+    public ResponseEntity<TokenResponseDTO> authorize(HttpServletRequest request) {
         HttpHeaders responseHeaders = new HttpHeaders();
 
         String oauth_token = request.getHeader("oauth_token");
@@ -46,19 +49,19 @@ public class UsosController {
         try {
             String responseToken = authorizationService.authorize(oauth_token, oauth_token_secret, oauth_verifier);
             responseHeaders.add("authorization", responseToken);
-            return ResponseEntity.status(HttpStatus.OK).headers(responseHeaders).body(responseToken);
+            return ResponseEntity.status(HttpStatus.OK).headers(responseHeaders).body(new TokenResponseDTO(responseToken));
         } catch (NoSuchAlgorithmException | InvalidKeyException | IOException e) {
-            return ResponseEntity.status(HttpStatus.BAD_REQUEST).headers(responseHeaders).body(e.getCause().toString());
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST).headers(responseHeaders).body(new TokenResponseDTO(e.getCause().toString()));
         }
     }
 
     @GetMapping("/request_token")
-    public ResponseEntity<String> getToken(@RequestParam(required = false, defaultValue = "oob") String oauth_callback) {
+    public ResponseEntity<UsosResponseDTO> getToken(@RequestParam(required = false, defaultValue = "oob") String oauth_callback) {
         HttpHeaders responseHeaders = new HttpHeaders();
         try {
-            return ResponseEntity.status(HttpStatus.OK).headers(responseHeaders).body(authorizationService.requestToken(oauth_callback));
+            return ResponseEntity.status(HttpStatus.OK).headers(responseHeaders).body(new UsosResponseDTO(authorizationService.requestToken(oauth_callback)));
         } catch (NoSuchAlgorithmException | UnsupportedEncodingException | InvalidKeyException e) {
-            return ResponseEntity.status(HttpStatus.BAD_REQUEST).headers(responseHeaders).body(e.getCause().toString());
+            return ResponseEntity.status(HttpStatus.BAD_REQUEST).headers(responseHeaders).body(new UsosResponseDTO(e.getCause().toString()));
         }
     }
 
diff --git a/BackEnd/src/main/java/studycave/studycaverestservice/usos/TokenResponseDTO.java b/BackEnd/src/main/java/studycave/studycaverestservice/usos/TokenResponseDTO.java
new file mode 100644
index 0000000..1319ad3
--- /dev/null
+++ b/BackEnd/src/main/java/studycave/studycaverestservice/usos/TokenResponseDTO.java
@@ -0,0 +1,16 @@
+package studycave.studycaverestservice.usos;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class TokenResponseDTO {
+
+    private String key;
+
+}
diff --git a/BackEnd/src/main/java/studycave/studycaverestservice/usos/UsosResponseDTO.java b/BackEnd/src/main/java/studycave/studycaverestservice/usos/UsosResponseDTO.java
new file mode 100644
index 0000000..6e6a113
--- /dev/null
+++ b/BackEnd/src/main/java/studycave/studycaverestservice/usos/UsosResponseDTO.java
@@ -0,0 +1,17 @@
+package studycave.studycaverestservice.usos;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class UsosResponseDTO {
+
+    private String url;
+
+}
diff --git a/BackEnd/src/main/resources/application.properties b/BackEnd/src/main/resources/application.properties
index c265803..b4690ea 100644
--- a/BackEnd/src/main/resources/application.properties
+++ b/BackEnd/src/main/resources/application.properties
@@ -6,6 +6,8 @@ spring.datasource.password=L0XIcnvtWpYEnr4w
 spring.servlet.multipart.max-file-size=500KB
 spring.servlet.multipart.max-request-size=500KB
 
+#server.address=51.75.30.146
+#server.port=8080
 
 #usos instance to use
 usos.baseURI=https://usosapps.amu.edu.pl