Click the "Add User" button on the left to add new user.
Fill the new user details - Email, Name and Password.
On the Groups pick list, select Advertiser.
* Advertiser permission, gives the user access only to its reports.
Select the required advertiser from the list.
Once form completed, click Create.
Share with your Advertiser its credentials. The only screen your advertiser may access is its reporting with the following fields -