TokenClient::refreshAccessToken

protected function refreshAccessToken()
{
	$success = $this->token->refresh(new IntegrationOAuthBitrix24());
	if ($success)
	{
		$this->setAccessToken($this->token->getAccessToken());
		$this->setRefreshToken($this->token->getRefreshToken());
		$this->setEndPoint($this->token->getRestEndpoint());
	}

	return $success;
}