NOTE: You will need to be an owner or admin to do this.
THE QUICKEST WAY TO GET TO THE NEW USER BOX IS FROM YOUR DASHBOARD.
Click on your Dashboard (PastorsLine icon, top item in left-hand most column) --> Locate the Add new section --> Click on +Person.
See those steps in action
View this product tour.
Here is a walkthrough video:
Get more details about this process:
Here is the link to the specific section
of this general article. [The video is repeated there if needed.]