How connect Auht0 register with AWS marketplace

Hi community

Actually, I’m connecting my app with with AWS-marketplace, the connections requires make a redirection to my registration URL which will have a temporary token. I try using actions (post-user-registration) and trying to read the query params but that is no possible, context. The solution suggest send an email but that is not my case.

Now, exploring a little the aws-marketplace, I saw that Auht0 is in martekplace here.

Could you help me with the workflow I should use to connect with that service?