Important: You need to be "Super User" / "Admin" of your company in order to be able to verify who has access to your company details.
#1 : Click on the "3 dots" related to the access point you want to share
#2 : Select "share access"
#3 : Enter the email of the collaborator you want to grant access too (an account is required)
#4 : Choose the data or the period you want to share
#5 : Confirm and grant access, your collaborators will receive and invitation by mail