Go to People > Click on +New

Please enter your employee's name, email address, and join date then click on "Save and Invite". 

Email address in blue means it has been successfully verified;
The black one with a red icon✉️ means this email address hasn't been verified yet, therefore the employee can't use Staff App. 

Employee Verify Their Email Address and First-time Login on Staff App

Edit Employee Personal Information

Using Staff Template File to Import Staff