"users" is a valid username and conflicts with an unused route
/users/...
is clearly a reserved top-level route:
https://gitlab.com/users/sign_in
https://gitlab.com/users/auth/google_oauth2
But /users
by itself is unused, and surprisingly, "users" is a valid username.
Arif has apparently figured this out: https://gitlab.com/users
It seems like "users" should be a forbidden username, as /users
by itself may become useful.