changed the application properties

ZipTeamOrange-server/src/main/java/ZipTeamOrange/chat/Chat.java

 
 import ZipTeamOrange.message.Message;
 import ZipTeamOrange.user.User;
-
 import javax.persistence.*;
 import java.util.Set;
 

ZipTeamOrange-server/src/main/java/ZipTeamOrange/message/Message.java

 
 import ZipTeamOrange.chat.Chat;
 import ZipTeamOrange.user.User;
-
 import javax.persistence.*;
 
 @Entity

ZipTeamOrange-server/src/main/java/ZipTeamOrange/user/User.java

 
 import ZipTeamOrange.chat.Chat;
 import ZipTeamOrange.message.Message;
-
 import javax.persistence.*;
 import java.util.Set;
 
             joinColumns = { @JoinColumn(name = "user_id") },
             inverseJoinColumns = { @JoinColumn(name = "chat_id") }
     )
-    private Chat chat;
+    private Set<Chat> chat;
 
 
     public User() {

ZipTeamOrange-server/src/main/resources/application.properties

+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
 spring.jpa.hibernate.ddl-auto=create-drop
 spring.datasource.url=jdbc:mysql://localhost:3306/ZipTeamOrange?useSSL=false
 spring.datasource.username=root
-spring.datasource.password=password
+logging.level.org.hibernate.SQL=DEBUG
+logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE