As of August 04, 2023, you can now add a temporary or permanent user to cPanel.
In summary, see the 'Manage Team' icon in your cPanel. then, create a user with his email (the password must be initialized by you at this time, then give the user the cPanel login address with his chosen email and password), then , the possible roles, and a possible validity period of the access.
Complete source reference in English on the cPanel site :
https://docs.cpanel.net/cpanel/preferences/create-a-team-user/
