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Hi MikeMirzayanov! Thanks for implementing this feature. I'm have a third-party application that uses the Codeforces API and OAuth to track user profiles. I noticed that querying user.info with an old handle returns the new handle, which is very helpful for syncing handle changes automatically.

Quick question: Is this redirect behavior permanent, or is there a time limit after which the old handle stops redirecting to the new one? For example, if someone changes their handle from oldHandle to newHandle, will querying user.info?handles=oldHandle always return newHandle, or will this mapping expire after some time (e.g., 30 days, 1 year)?

This would help me design a more robust sync mechanism. Thanks!

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