CAllUser::LoginByOtp

public function LoginByOtp($otp, $remember_otp = 'N', $captcha_word = '', $captcha_sid = '')
{
	if (!CModule::IncludeModule("security") || !BitrixSecurityMfaOtp::isOtpRequired())
	{
		return ["MESSAGE" => GetMessage("USER_LOGIN_OTP_ERROR") . "
", "TYPE" => "ERROR"];
	}

	$userParams = BitrixSecurityMfaOtp::getDeferredParams();

	$userParams["OTP"] = $otp;
	$userParams["OTP_REMEMBER"] = ($remember_otp === 'Y');
	$userParams["CAPTCHA_WORD"] = $captcha_word;
	$userParams["CAPTCHA_SID"] = $captcha_sid;

	if (!BitrixSecurityMfaOtp::verifyUser($userParams))
	{
		return ["MESSAGE" => GetMessage("USER_LOGIN_OTP_INCORRECT") . "
", "TYPE" => "ERROR"];
	}

	$this->Authorize($userParams["USER_ID"], ($userParams["REMEMBER"] == 'Y'));
	return true;
}