How to use the @feathersjs/commons.makeUrl function in @feathersjs/commons

}

    const authSettings = app.get('auth') || app.get('authentication') || {};

    // Attempt to pull options from the global auth config
    // for this provider.
    const providerSettings = authSettings[name] || {};
    const oauth2Settings = merge({
      idField: `${name}Id`,
      path: `/auth/${name}`,
      __oauth: true
    }, pick(authSettings, ...INCLUDE_KEYS), providerSettings, omit(options, ...EXCLUDE_KEYS));

    // Set callback defaults based on provided path
    oauth2Settings.callbackPath = oauth2Settings.callbackPath || `${oauth2Settings.path}/callback`;
    oauth2Settings.callbackURL = oauth2Settings.callbackURL || makeUrl(oauth2Settings.callbackPath, app);

    if (!oauth2Settings.clientID) {
      throw new Error(`You must provide a 'clientID' in your authentication configuration or pass one explicitly`);
    }

    if (!oauth2Settings.clientSecret) {
      throw new Error(`You must provide a 'clientSecret' in your authentication configuration or pass one explicitly`);
    }

    const Verifier = options.Verifier || DefaultVerifier;
    const formatter = options.formatter || rest.formatter;
    const handler = options.handler || defaultHandler(oauth2Settings);
    const errorHandler = typeof options.errorHandler === 'function' ? options.errorHandler(oauth2Settings) : defaultErrorHandler(oauth2Settings);

    // register OAuth middleware
    debug(`Registering '${name}' Express OAuth middleware`);

const authSettings = app.get('auth') || app.get('authentication') || {};

    // Attempt to pull options from the global auth config
    // for this provider.
    const providerSettings = authSettings[name] || {};
    const oauth1Settings = merge({
      idField: `${name}Id`,
      path: `/auth/${name}`,
      session: true,
      __oauth: true
    }, pick(authSettings, ...INCLUDE_KEYS), providerSettings, omit(options, ...EXCLUDE_KEYS));

    // Set callback defaults based on provided path
    oauth1Settings.callbackPath = oauth1Settings.callbackPath || `${oauth1Settings.path}/callback`;
    oauth1Settings.callbackURL = oauth1Settings.callbackURL || makeUrl(oauth1Settings.callbackPath, app);

    if (!oauth1Settings.consumerKey) {
      throw new Error(`You must provide a 'consumerKey' in your authentication configuration or pass one explicitly`);
    }

    if (!oauth1Settings.consumerSecret) {
      throw new Error(`You must provide a 'consumerSecret' in your authentication configuration or pass one explicitly`);
    }

    const Verifier = options.Verifier || DefaultVerifier;
    const formatter = options.formatter || rest.formatter;
    const handler = options.handler || defaultHandler(oauth1Settings);
    const errorHandler = defaultErrorHandler(oauth1Settings);

    // register OAuth middleware
    debug(`Registering '${name}' Express OAuth middleware`);