You can generate access codes to manually add users to your app. This method is only recommended for cases in which you do not have users’ email addresses or contact information. In such cases, the credentials can be distributed in person, by mail, or via another method of your choice. 

1. In the Studio, navigate to User Settings.
2. Click Add user.
   A dialog opens to invite a new user.
3. Click Create access codes.
4. Insert the number of access codes you want to generate.
   
   
5. Click Create codes.
   You have generated access codes. This has created one new user per code in your app.
   You are automatically redirected to the Pending Users tab, where you can now edit the details of each user.