How to use the expo-constants.linkingUrl function in expo-constants

const createAuthRedirectUrl = (authUrl: string): string => {
  const { protocol, hostname, port } = url.parse(__WEBSITE_URL__);
  // Both iOS Simulator and Node backend on iOS use localhost, so no need to use nip.io in this case
  const expoHostname = hostname === 'localhost' ? `localhost` : `${url.parse(Constants.linkingUrl).hostname}.nip.io`;
  const urlHostname = __DEV__ ? expoHostname : hostname;

  return `${protocol}//${urlHostname}${port ? ':' + port : ''}${authUrl}?expoUrl=${encodeURIComponent(
    Constants.linkingUrl
  )}`;
};

const createAuthRedirectUrl = (authUrl: string): string => {
  const { protocol, hostname, port } = url.parse(__WEBSITE_URL__);
  // Both iOS Simulator and Node backend on iOS use localhost, so no need to use nip.io in this case
  const expoHostname = hostname === 'localhost' ? `localhost` : `${url.parse(Constants.linkingUrl).hostname}.nip.io`;
  const urlHostname = __DEV__ ? expoHostname : hostname;

  return `${protocol}//${urlHostname}${port ? ':' + port : ''}${authUrl}?expoUrl=${encodeURIComponent(
    Constants.linkingUrl
  )}`;
};

it('should have other props', () => {
    (Constants.deviceId: ?string);
    (Constants.linkingUrl: ?string);
  });

export default function buildRedirectUrlForMobile(authType) {
  const { protocol, hostname, port } = url.parse(__WEBSITE_URL__);
  const expoHostname = `${url.parse(Constants.linkingUrl).hostname}.nip.io`;
  const urlHostname = __DEV__ ? expoHostname : hostname;

  return `${protocol}//${urlHostname}${port ? ':' + port : ''}/auth/${authType}?expoUrl=${encodeURIComponent(
    Constants.linkingUrl
  )}`;
}

export default function buildRedirectUrlForMobile(authType) {
  const { protocol, hostname, port } = url.parse(__WEBSITE_URL__);
  const expoHostname = `${url.parse(Constants.linkingUrl).hostname}.nip.io`;
  const urlHostname = __DEV__ ? expoHostname : hostname;

  return `${protocol}//${urlHostname}${port ? ':' + port : ''}/auth/${authType}?expoUrl=${encodeURIComponent(
    Constants.linkingUrl
  )}`;
}