private function createUserWithPerm(array $perm)
 {
     DB::table('users')->insert(["email" => $this->faker->email(), "password" => $this->faker->text(10), "activated" => 1, "permissions" => json_encode($perm), "created_at" => $this->getNowDateTime(), "updated_at" => $this->getNowDateTime()]);
     return User::first();
 }
 protected function assertEmptyUsers()
 {
     $this->assertNull(User::first());
 }