/**
  * Add an user to the database.
  *
  * @param string $username The username.
  *
  * @param string $password The password.
  *
  * @return UserInformation
  */
 private function createUser($username, $password)
 {
     $user = new UserInformation(['username' => $username, 'acl' => UserInformationInterface::ROLE_ALL]);
     $user->set('password', $this->get('security.password_encoder')->encodePassword($user, $password));
     $user = $this->get('tenside.user_provider')->addUser($user)->refreshUser($user);
     return $user;
 }