Oauth configuration and URL Opener for social login

AuthScreen.js

import { Linking } from 'expo';
import * as WebBrowser from 'expo-web-browser';

/**Amplify documentation has this example */
const urlOpenerExpo = async (url, redirectUrl) => {
  console.log(">>>>>>>>> in urlOpener")
  // On Expo, use WebBrowser.openAuthSessionAsync to open the Hosted UI pages.
  const { type, url: newUrl } = await WebBrowser.openAuthSessionAsync(url, redirectUrl);

  console.log("Type")
  console.log(type)
  console.log(newUrl)

  if (type === 'success') {
      await WebBrowser.dismissBrowser();

      if (Platform.OS === 'ios') {
      return Linking.openURL(newUrl);
      }
  }
  
};


const oauth = {
  // Domain name //********.auth.us-east-1.amazoncognito.com
  domain : '<Cognito Pool OAuth DOMAIN name>', 

  // Authorized scopes
  scope : ['phone', 'email', 'profile', 'openid','aws.cognito.signin.user.admin'], 

  // Callback URL
  redirectSignIn : 'expoamplifytest://', // http://www.example.com/signin/ or 'exp://127.0.0.1:19000/--/', 'myapp://main/'

  // Sign out URL
  redirectSignOut : 'expoamplifytest://', // 'http://www.example.com/signout/' or 'exp://127.0.0.1:19000/--/', 'myapp://main/'

  // 'code' for Authorization code grant, 
  // 'token' for Implicit grant
  // Note that REFRESH token will only be generated when the responseType is code
  responseType: 'code',

  // optional, for Cognito hosted ui specified options
  options: {
      // Indicates if the data collection is enabled to support Cognito advanced security features. By default, this flag is set to true.
      AdvancedSecurityDataCollectionFlag : true
  },

  urlOpener: urlOpenerExpo
}
awsconfig.oauth = oauth;


onst expoScheme = "expoamplifytest://"
let redirectUrl = Linking.makeUrl();
console.log(redirectUrl)
// simulator on localhost and devices on LAN
if (redirectUrl.startsWith('exp://1')) {
  redirectUrl = redirectUrl + '/--/';
} else
if (redirectUrl === expoScheme) {
  // no change required
} else {
  // for expo client
  redirectUrl = redirectUrl + '/'
}

awsconfig.oauth.redirectSignIn = redirectUrl;
awsconfig.oauth.redirectSignOut = redirectUrl;

Amplify.configure(awsconfig);
Auth.configure(awsconfig);