If anyone is interested, solved this by writing my own oauth2 flow using webviews. If using flutter I don't recommend use oauth2_client.

What was the issue? I am also seeing this

Blocked on this if anyone can give me a hand?

Hey everyone. I have been bashing my head against this for a few days and have finally given up and turned to the forums for help. I am trying to auth a flutter application with simpro using the flutter oauth2_client package https://pub.dev/packages/oauth2_client. All appears to be working, I get ta...