If you wish to give access only to a certain domain name for your program registration, you can use the REGEX option on the platform. This is the closest you can get to SSO.

Here's how to set up your regex:
👉 Go to the Registration tab in the setup menu
👉 Scroll, you'll find a field to fill in the emails corresponding to the REGEX

Don't know how to create a REGEX form?
It's very simple: go to chatgpt and ask it to "create me a REGEX form for emails with the domain name ... (insert the domain name of authorized e-mail addresses)".

Once you've done this, you can check your formula on this site: https://regex101.com/
If it's validated, you can copy it into the field.