Unable to exchange token with Auth0 after Apple Sign In

I followed below approach but in Xamarin to achieve apple sign in.

But i am not able to get the exchange token from Auth0 after getting the Authorization token from Apple.
Followed below links for the same:

i am getting this below error in response:
{“error”:“invalid_grant”,“error_description”:“Invalid authorization code”}

Could anyone help me to resolve this issue.

Thank you

Could anyone help me in this regards.

You’ve probably passing data to /oauth/token endpoint wrong, take attention to content-type it should be x-www-formurlencoded, not a json.

I personally have passed this, but struggling with error from apple