Go to the Admin "home" (go to the dropdown next to your avatar and select ADMIN). Then, select "Users" from the left-hand nav bar.
Note: This only works on certain site settings to protect the privacy of our client sites. To learn more on how to invite users for your unique site, please CONTACT US.
To view all the people who have registered to the site, click on the Registered Users tab. From here, you can also edit people's roles, i.e., make someone an Admin. (Click Edit next to their email, on the next page, scroll down to find the Role dropdown).
Go back to the Support page.