Enable guest access
From MoodleDocs
You must first enable guest access on your site and then in your course.
Guest access to the site
- Log in with your administrator account
- From the left panel (the Navigation drawer) click Site administration
- Click Users and then from Permissions, click User policies
- Tick the box Auto-login guests
5. Click the Plugins" tab and scroll down to Authentication
6. Click Manage authentication
7. Make sure the Guest login button is set to 'Show'