To add a user manually to your site, go to > Site > People > Add User
Enter their First Name, Last Name, E-mail Address, and select their Role type, such as "Student".
You can also add Tags, Set Manual Password for the user or get the system to send a notification email with a reset password link.
Other fields: Address, City, State, Country, Zip Code or postcode & Phone etc.
For a student, you can select a course to enroll them automatically at the same time.
At the bottom, check ON the option to send a notification email to the user, which includes a reset password link. If you haven't set up a password for them manually, they will need this email to be able to set a password of their own.
Finally, click "Add".
Zenler makes it very easy to add users and has full control over their roles and what they are subscribed to.
Also, watch the video on 'Adding a User Manually'