https://dev.to/dabit3/the-complete-guide-to-user-authentication-with-the-amplify-framework-2inh
if you are getting invalid_grant, try re-login to Facebook again.
https://docs.aws.amazon.com/cognito/latest/developerguide/token-endpoint.html
https://dev.to/dabit3/the-complete-guide-to-user-authentication-with-the-amplify-framework-2inh
if you are getting invalid_grant, try re-login to Facebook again.
https://docs.aws.amazon.com/cognito/latest/developerguide/token-endpoint.html