public function createUserList()
 {
     // fetch users list from gitlab and create file.
     $client = new HttpClient();
     $body = $client->getAllUsers();
     $users = [];
     foreach ($body as $u) {
         $users[$u->id] = ['name' => $u->name, 'username' => $u->username, 'state' => $u->state];
     }
     \Storage::put($this->userList, json_encode($users, JSON_PRETTY_PRINT));
     return $users;
 }