public function setAccessToken(ApiAccessToken $token)
    {
        file_put_contents($this->filename, $token->getToken() . '|'. $token->getExpiresAt());
    }
public function setAccessToken(ApiAccessToken $token)
    {
        file_put_contents($this->filename, $token->getToken() . '|'. $token->getExpiresAt());
    }
{@inheritdoc}