Interrapt G35

Only an admin user should be able to register an attendee for a webinar.
Both, an admin user and a normal user should be able to create an attendee. For a new attendee to be created a webinar must be selected. Therefore in the create form a normal user can register an attendee for a webinar when creating the new attendee.

Environment
iPhone 15, iOS 17.5.1
https://qainterrapt.brainster.xyz/login

1. Login to the system as a normal user
2. Click on the `Attendees` button via navigation menu
3. Click the 'Create' button
4. Fill in the 'Name' field with valid data
5. Fill in the 'Surname' field with valid data
6. Fill in the 'Email' field with valid data
7. Select a webinar from the 'Webinar' drop-down menu
8. Click the 'CREATE' button
9. Observe if a new attendee is created and registered for a webinar

Expected result
A normal user should not be able to register an attendee for a webinar.

Actual result
A normal user can register an attendee for a webinar when creating a new attendee.