First you will want to see if they are already a user of WordPress and can be added that way. Click on “Add New” under the “User” menu.
Add New User

Then add their username under the “Add Existing User” also select the Role you would like them to have and then click the “Add Existing User”
Add Existing User

If you receive an error at the top of the page saying “User does not exist”. Then follow the steps below to add them as a Directory Authenticated User.
user does not exist

To accomplish this, navigate to the “Add New Directory Authenticated User” under the Users menu.
Add user

Enter in the user’s Pawprint username

Select the Role in which you would like them to have from that dropdown box
User Role

Select the “Skip Confirmation Email” checkbox, and click “Add New User”.