I am using the Xamarin.Auth in Xamarin.Forms using a shared project (not a PCL) and trying to get the amazon presenter to work properly. I believe I have it all down, except the presenter is not closing. I am guessing that it is due to my redirect_uri being incorrect. However, I cannot find what the format that they are sending back. Google wants the client ID returned backwards, others have a URL, etc. When I used it with my Amazon Echo Skill (Audubon Bird Calls) it redirects to some weird login for "layla" so apparently they may not be adhering to any standards....oh yeah, there are not any!
I was hoping to use the Cognito service from Amazon, but ran into similar issues.
Thanks for the guidance!