General help

Hi all,

I have searched on this topic and can't find an answer or whether it is possible.

We currently have a registration system that links to our VETtrak integration to Moodle. On registration, the student receives an email with the course link and enrolment key. They then log in using the link and come to the self enrolment page where they then enter the key.

Is there a way to use or create a URL that has the enrolment key on the end so that after log in the student would be automatically enrolled?
e.g. www.site/course/view.php?id=332-enrolmentkey

We can't use autoenrol as not all students are taking the same courses, and we don't always know our cohort so we can't bulk enrol them on the Moodle side.

I am hopeful this can be done. Any information would be fantastic.
Thanks Leticia