我是一个 Discourse 社区的用户，我想知道是否有任何方法来通过 user ID 获取用户名。或者从用户 nickname 获取用户名。
You may want to look at this topic. AFAIK you can’t access a user route with the user id like /u/id. Also the API docs are on getting user info from the user id are only by the admin route, it seems:
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