src/Provider/Ifsta.php
public function urlUserDetails(\League\OAuth2\Client\Token\AccessToken $token)
    {
        return $this->domain . '/api/userinfo?access_token=' . $token;
    }
public function urlUserDetails(\League\OAuth2\Client\Token\AccessToken $token)
    {
        return $this->domain . '/api/userinfo?access_token=' . $token;
    }
Get provider URL to fetch user details

@param AccessToken $token
@return string