In the Bridge tool, users can be managed from the settings page. 

In order to add or remove users you must have: 

• Admin permission set - Can add or remove users for all store locations 
• User - Report/Dashboard access only, no user mangement

1. To begin - click on your initials in the lower left corner of the screen to go to Settings. 
 

2. From your settings page, click on "Manage Users"

Once you're on the Manage Users page, you can invite a user by clicking on the Invite User button.