src/Services/AuthService.php
public function refreshAccessToken($organisationCode, $clientSecret, $refreshToken)
    {
        return $this->request(
            new RefreshAccessTokenRequest($organisationCode, $clientSecret, $refreshToken)
        );
    }
public function refreshAccessToken($organisationCode, $clientSecret, $refreshToken)
    {
        return $this->request(
            new RefreshAccessTokenRequest($organisationCode, $clientSecret, $refreshToken)
        );
    }
@param $organisationCode
@param $clientSecret
@param $refreshToken

@return AccessToken