I didn’t find a way to change a user’s URL, but doing a search on Medium, I saw that all user URLs have @ in the user name of their URL.
this would highlight the a lot the user name for links on social networks. 
Exemple:
Discourse
Medium
I love the forum, but I think highlighting the URL better and also the last post will make people share your URL more…
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Sorry, I am not sure I understand what you’re asking for here?
Qursch
3
I believe he is asking if and how it is possible to change the user path from site.com/u/{user} to site.com/@{user}.
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