signInWithGoogleAsync

 signInWithGoogleAsync = async () => {
    try {
      const result = await Google.logInAsync({
        androidClientId: ANDRIOID_CLIENT_ID,
        iosClientId: IOS_CLIENT_ID,
        behavior: 'web',
        iosClientId: '', //enter ios client id
        scopes: ['profile', 'email']
      });

      if (result.type === 'success') {
        this.onSignIn(result);
        return result.accessToken;
      } else {
        return { cancelled: true };
      }
    } catch (e) {
      return { error: true };
    }
  };