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Callback error based on GitHub authorization
I was able to successfully use localhost authorization callback locally, but after publishing flutter web to github page, authorization prompts the following error
{"message":"User (role: guests) missing scope (account)","code":401,"type":"general_unauthorized_scope","version":"0.11.27"}
TL;DR
The user is experiencing a callback error related to GitHub authorization. The issue is likely caused by 3rd party cookies. The solution is to search for similar posts for guidance. Additionally, the user tried OAuth for authorization and it worked locally, but encountered an error after publishing to a GitHub page. The error message states that the user is missing a scope, causing a 401 unauthorized error. 
So you're authenticating using oauth?
Yes, I tried OAuth as mentioned in the documentation for authorization.
The problem is most likely with 3rd party cookies. You can search for similar posts regarding this
