User API keys: payload and existing query string leads to a double question mark

If I call user-api-key/new with an auth_redirect already containing a query string (e.g. http://localhost:30120/auth-discourse?state=BASE64), I end up with a redirect URI along the likes of http://localhost:30120/auth-discourse?state=BASE64?payload=PAYLOAD - two query strings, and no & appending.

https://github.com/discourse/discourse/blob/888e68a1637ca784a7bf51a6bbb524dcf7413b13/app/controllers/user_api_keys_controller.rb#L96

This code might need to be changed to check if there’s already a query string in the URI, or perhaps use some URI builder?

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It does seem like the assumption the code makes is that it doesn’t already contain any query parameters. We’d be open to a PR to fix this.

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I have opened PR for this issue here:
https://github.com/discourse/discourse/pull/7923

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PR has been merged. This topic can be closed :smile:

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