/**
  * Get the email of a user for use in sending emails
  * @param  string $username
  * @return string
  */
 private function getEmail($username)
 {
     return User::where('username', $username)->first()->email;
 }
 /**
  * Get id of the user
  * @param  string $username
  * @return mixed  null | integer
  */
 private function getId($username)
 {
     $result = User::where('username', $username)->first();
     return is_null($result) ? null : $result->id;
 }