AzuraCast/app/models/Repository/UserRepository.php

<?php
namespace Entity\Repository;

use Entity;

class UserRepository extends \App\Doctrine\Repository
{
    /**
     * @param $username
     * @param $password
     * @return bool|null|object
     */
    public function authenticate($username, $password)
    {
        $login_info = $this->findOneBy(['email' => $username]);

        if (!($login_info instanceof Entity\User)) {
            return false;
        }

        if ($login_info->verifyPassword($password)) {
            return $login_info;
        } else {
            return false;
        }
    }

    /**
     * Creates or returns an existing user with the specified e-mail address.
     *
     * @param $email
     * @return Entity\User
     */
    public function getOrCreate($email)
    {
        $user = $this->findOneBy(['email' => $email]);

        if (!($user instanceof Entity\User)) {
            $user = new Entity\User;
            $user->email = $email;
            $user->name = $email;
        }

        return $user;
    }
}