Follow the steps below to add Users to Postal.
Navigate to your Profile by clicking on your name in the top right
Find Profile Settings on the left then select 'Users'
Select 'Invitations'
Invite a new user by filling out their email, assigning them a team, and choosing which role(s) they will receive
Learn more about roles and permission levels here.
Once the Admin invites the User, the User can log in and go between the account(s) that they are granted access to.
Learn more about adding teams to Postal here.