Please find below the steps to Login via Facebook:
1. Open the Altt app.
2. Go to Settings > Select Sign in option.
3. On Sign in Page Users will see 'Sign in with Facebook' option. Click on it.
4. User will be able to see the code screen along with the steps to confirm the code on Facebook. Please follow the same.
5. Users can either Confirm the code from Facebook Android App or on Facebook Website 'facebook.com/device'.
6. Post Confirmation of code users will be able to sign in via Facebook.