getTokenPostData method
Gets the data that will be posted to swap the auth code for an auth token
Implementation
@override
Future<Map<String, dynamic>> getTokenPostData(String? clientSecret) async {
var map = await super.getTokenPostData(clientSecret);
map["redirect_uri"] = redirectUrl;
if (usePkce!){
map["code_verifier"] = verifier;
}
return map;
}