You can disable user registration in the ACP. If you also disable local login, then the login button will automatically redirect you to steam login.
Just installed Nodebb to Ubuntu server with Nginx reverse proxy according to the guide (https://docs.nodebb.org/installing/os/ubuntu/).
But on the homepage, I see only three words: "Categories", "Register", "Login". The problem is that I need to create the admin user but registration is impossible due to username validation error. Under username field I can see:
A unique username between and characters. Others can mention you with @username.
And whatever I type, I get:
Username too long
I've tried upgrading and rebuilding assets, nothing seems to help.
No errors seen both in the browser console and in the output of ./nodebb dev
Thank you in advance for your help!