Possible settings and admin access

I would like to know how to work on adding another brand. However, primarily, I would like to know who registered.

The access admin@tiledesk.com is super admin, but I can’t find out who registered on the platform, who is using it, and I can’t block or delete if necessary. Where can I see this information? Is there any documentation for this more managerial access?

Another question, I would like to know if there is a document with all the available configurations and environment variables for setup, for knowledge purposes.