feat(user-oauth): Update id generation for prevent strange id

src/main/java/fr/univnantes/webandcloud/api/core/UserOAuth.java

@@ -54,8 +54,8 @@ public class UserOAuth implements WithAncestor<User> {
      * @param userIdOfProvider    String represent id of user in this provider
      */
     public UserOAuth(@NonNull User userRelated, @NonNull String providerNameRelated, @NonNull String userIdOfProvider) {
-        this(String.format("%s-%s", userRelated.getId(), providerNameRelated), userRelated, providerNameRelated,
-                userIdOfProvider);
+        this(userRelated.getId() != null ? String.format("%s-%s", userRelated.getId(), providerNameRelated) : null,
+                userRelated, providerNameRelated, userIdOfProvider);
     }
 
     /**