Set permission level for certain user with access only on the reports of 1 company

Hi! We have 2 companies in our erpnext, we would like to set permission to a certain user to view only the details and reports of only one company. How can I do it? thanks in advance.

If you are not sharing customers, suppliers, contacts, it is best to keep separate databases.

Else read this:

https://erpnext.com/user-guide/setting-up/permissions/user-permissions