/**
* Signs user with given credentials
* @return string|null JWT or null if user is not saved or does not have getJWT method
*/
public function sign()
{
$user = new User();
$user->username = $this->username;
$user->email = $this->email;
$user->setPassword($this->password);
// This way we check whether JWT is included. And even if it's not but
// method is present - it's developer's mistake
if (method_exists($user, 'getJWT')) {
if ($user->save()) {
return $user->JWT;
}
}
return null;
}
