diff --git a/backend/src/main/java/com/edufocus/edufocus/video/service/VideoSertvice.java b/backend/src/main/java/com/edufocus/edufocus/video/service/VideoSertvice.java
index 53428f9..71b34d9 100644
--- a/backend/src/main/java/com/edufocus/edufocus/video/service/VideoSertvice.java
+++ b/backend/src/main/java/com/edufocus/edufocus/video/service/VideoSertvice.java
@@ -4,8 +4,10 @@ import java.sql.SQLException;
 
 public interface VideoSertvice {
 
-    void startOnline(Long userId,Long lectureId) throws SQLException;
+    void startOnline(Long userId, Long lectureId) throws SQLException;
 
-    boolean isRoomAccessible(Long lectureId,Long userId);
+    void stopOnline(Long userId, Long lectureId) throws SQLException;
+
+    boolean isRoomAccessible(Long lectureId, Long userId);
 
 }
diff --git a/backend/src/main/java/com/edufocus/edufocus/video/service/VideoServiceImpl.java b/backend/src/main/java/com/edufocus/edufocus/video/service/VideoServiceImpl.java
index c6328e2..cf9714e 100644
--- a/backend/src/main/java/com/edufocus/edufocus/video/service/VideoServiceImpl.java
+++ b/backend/src/main/java/com/edufocus/edufocus/video/service/VideoServiceImpl.java
@@ -10,36 +10,39 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
 import java.sql.SQLException;
+
 @Service
 @Transactional
 @RequiredArgsConstructor
-public class VideoServiceImpl implements VideoSertvice{
+public class VideoServiceImpl implements VideoSertvice {
+
+    private final LectureService lectureService;
+    private final RegistrationService registrationService;
 
-   private final LectureService lectureService;
-   private final RegistrationService registrationService;
     @Override
-    public void startOnline(Long userId,Long lectureId) throws SQLException {
+    public void startOnline(Long userId, Long lectureId) throws SQLException {
 
         lectureService.changeState(lectureId);
     }
 
+    @Override
+    public void stopOnline(Long userId, Long lectureId) throws SQLException {
+        lectureService.changeState(lectureId);
+    }
+
     @Override
     public boolean isRoomAccessible(Long lectureId, Long userId) {
 
 
-
-		LectureDetailResponse lecture= lectureService.findLectureById(userId,userId);
+        LectureDetailResponse lecture = lectureService.findLectureById(userId, userId);
 
 
-		RegistrationStatus registrationStatus = registrationService.getStatus(userId,lectureId);
+        RegistrationStatus registrationStatus = registrationService.getStatus(userId, lectureId);
 
 
-		if(registrationStatus==RegistrationStatus.ACCEPTED && lecture.isOnline())
-		{
+        if (registrationStatus == RegistrationStatus.ACCEPTED && lecture.isOnline()) {
             return true;
-        }
-        else
-        {
+        } else {
             return false;
         }
     }
diff --git a/backend/src/main/resources/application.properties b/backend/src/main/resources/application.properties
index b774bfc..aa22dc0 100644
--- a/backend/src/main/resources/application.properties
+++ b/backend/src/main/resources/application.properties
@@ -1,25 +1,17 @@
 spring.application.name=edufocus
 server.port=8080
-
 server.ssl.enabled=false
 server.servlet.context-path=${CONTEXT_PATH}
-
 # openvidu
 #server.port=${SERVER_PORT:6080}
-
-
 # LiveKit configuration
 livekit.api.key=${LIVEKIT_API_KEY:devkey}
 livekit.api.secret=${LIVEKIT_API_SECRET:secret}
 # JWT Salt (??? ?? ???? ???)
-
 jwt.salt=${SALT}
-
 # Access Token ?? ?? (??? ??)
 #jwt.access-token.expiretime=3600000
-
 jwt.access-token.expiretime=3000000
-
 # Refresh Token ?? ?? (??? ??)
 jwt.refresh-token.expiretime=504000000
 #jwt.refresh-token.expiretime=4000
@@ -28,21 +20,13 @@ spring.datasource.url=${DATA_SOURCE_URL}
 spring.datasource.username=${USER_NAME}
 spring.datasource.password=${USER_PASSWORD}
 spring.mvc.pathmatch.matching-strategy=ant_path_matcher
-
 spring.jpa.database=mysql
-spring.jpa.hibernate.ddl-auto=create
+spring.jpa.hibernate.ddl-auto=update
 spring.jpa.show-sql=true
-
-
 management.endpoints.web.exposure.include=health,info
 management.endpoint.health.show-details=always
-
-
-
 spring.rabbitmq.host=${RABBITMQ_HOST}
 spring.rabbitmq.port=${RABBITMQ_PORT}
 spring.rabbitmq.username=${RABBITMQ_USERNAME}
 spring.rabbitmq.password=${RABBITMQ_PASSWORD}
-
-
 image.path=${IMAGE_PATH}
\ No newline at end of file