This package provides Mail.ru integration for OAuth2 Client by the League.
composer require aego/oauth2-mailru$provider = new Aego\OAuth2\Client\Provider\Mailru([ 'clientId' => '123456', 'clientSecret' => 'f23ccd066f8236c6f97a2a62d3f9f9f5', 'redirectUri' => 'https://example.org/oauth-endpoint', ]);