Trouble retrieving Authorization Code using Oauth2 in Azure devops

Any luck on this:

1. Ensure Redirect URI Matches – The callback URL must exactly match the one registered in your app settings. If there's a mismatch, Azure DevOps will reject the request.
2. Use Correct Grant Type – The authorization endpoint (/oauth2/authorize) should use response_type=code, not Assertion. The token endpoint (/oauth2/token) should use grant_type=authorization_code.
3. Check Scope Formatting – Ensure the scope parameter is correctly formatted (vso.build_execute should be space-separated if multiple scopes are used).
4. Verify Client ID and Secret – Double-check that your client_id and client_secret are correctly passed in the request.