Proxying path to query

Hi all,

I have looked around for a while, but could not really find a solution to this issue. I am currently trying out the Free account to see if it fit my needs, and I would like to accomplish the following:

I have a webpage at https://mydomain.net/user?user_id=1234. My backend takes the query and fetches the data, as it should. I don’t wish to alter the origin, so I want the following to happen through proxy:
https://mydomain.net/user/1234

Needs to push a request to my origin as:

https://mydomain.net/user?user_id=1234

Can this be done?