Hello, I do not remember how to give access to a portal only to a particular group.
  "RequiredPermission": "portals.use"
In the case of a "vip" group how can I do it, I did it months ago and could not remember what I had done ...
Thank you in advance @LaserHydra

The Docs tab at the top of the site has an entire tutorial for using permissions

Yes, I just remembered and it's OK for me.
Thank you and sorry for the trouble guys !