public ConnectionService(IConnectionRepository repo, IUserRepository userRepo, IConnectionNotificationRepository notificationRepo)
 {
     _repo             = repo;
     _userRepo         = userRepo;
     _notificationRepo = notificationRepo;
 }
 public UserService(IUserRepository repo, IConnectionNotificationRepository repoNotif)
 {
     _repo      = repo;
     _repoNotif = repoNotif;
 }