public function addMember($project_id, $user_id)
 {
     $member = $this->repository->hasMember($user_id, $project_id);
     if (count($member) === 0) {
         return is_null(Project::find($project_id)->members()->attach($user_id));
     }
     return false;
 }
 public function removeProject($projectId)
 {
     $project = Project::find($projectId);
     if (!is_null($project)) {
         $project->members()->detach();
         $project->tasks()->delete();
         $project->notes()->delete();
         return $project->delete();
     }
     return true;
 }