Dear Elggers

Good Day!

I made some custom pages on my site and the trouble starts when new users try to select their users same as my custom pages. Let's say I have a page called mydomain.com/world and when new user selects (world) as his/her username then my site gives problems and shows my custom page instead of user profile. I tried to search around in elgg if there is something for username restrictions? So that I can add those words in the list and users are not allowed to keep those as their username.

I am sure that is easy but I have no any idea how I can do, please experts suggest something & guide me or create something for this issue.

Many many thanks in advance,

Cheers