Prompt team message during request of access

I receive requests to view Figma from persons not within my organization (they are using personal emails which I cannot identify who are them).

Suggestion:

1. Allow me to edit and prompt a message when users request to access Figma. This is so that I can put down some conditions for those requestors to be aware not to use personal emails, etc.
2. Or allow me to type in reason of rejection when I reject such request. This is so that such person can be aware why his/her request is rejected.