If you don't have a CSV file of people to import, you can add people one by one.
From the People tab, select Add Person.
If the person you're adding needs permissions in this app, add them from the Administrators tab to give them permissions at the same time.
Enter the name of the person you'd like to add. The database will populate any people in your account to ensure you don't add a person who already exists.
When you type the name, either choose the person from the dropdown list or select Create A New Person.
When you select Create A New Person, enter the person's information.