Hi discourse,
This question maybe asked, but I cannot find answer with keywords ‘admin-login’. My question is how can I disable user access for example, https://forums.example.com/u/admin-login?
AI-generated summary
The discussion revolves around disabling the /u/admin-login route in Discourse for security reasons. Hyan wants to restrict access to this route, as they are using basic_auth and consider it a risk exposure. Lilly questions the need to disable it, while ondrej highlights its usefulness in recovery scenarios. Firepup650 points out that only admins can use it, and pfaffman suggests using two-factor authentication instead of disabling the route, noting that no plugin exists to do so. Bas adds that self-hosted users could block the route via nginx, though it’s not recommended. Hyan clarifies that they misunderstood the behavior, realizing the route only works when logged in, and pfaffman confirms this can be confusing.
So why would you want to disable admin access?
exactly that.
If you ever get ‘locked out’ by read only mode or a misbehaving sso the admin login comes in quite handy 
Initially I have set user@example.com as admin. Then I have basic_auth connected. So I want to myself login only through basic_auth. So do for end users. This is a risk exposure if use access https://forums.example.com/u/admin-login.
How so? Only forum admins can use that login.
If you want increased security you can add a 2nd factor.
Are you also going to remove the forgot-password path? It has exactly the same security risk as the /u/login.
You could disable /u/admin-login with a plugin, which in the past 10 years, no one has wanted to have developed.
this is the way.
If you are self-hosting, you could also block the route in nginx etc.
Not recommended, but possible
Thank you all has replied the questions. My fault I thought the discourse has option to redirect the access
of /u/admin-login to its homepage. It turns out it because I’m in logged-in state, in which users are redirected.
Totally agreed /u/login is risky if admin-login is. 
HA! Yes. That can be confusing. It’s not a magic just-login-whoever-uses-that-url link!