adding members management

backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Discussion.java

@@ -51,4 +51,8 @@ public class Discussion{
 		msg.setDiscussion(this);
 		msgs.add(msg);
 	}
+
+    public void addMember(User user) {
+		members.add(user);
+    }
 }

backend/src/main/java/ovh/herisson/Clyde/Tables/Msg/Message.java

@@ -2,11 +2,13 @@ package ovh.herisson.Clyde.Tables.Msg;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.OneToOne;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
@@ -26,7 +28,7 @@ public class Message {
 	private long id;
 	private String content; 
 
-	@OneToOne
+	@ManyToOne
 	private User author;
 
 	public User getAuthor() {