Allow custom invite link

Hello,

I can see there are API endpoints for /users/invite and /users/invite/accept but is there any way when calling the /users/invite to pass a custom URL for the email to use rather than just sending the normal admin URL as I need two invite pages that go to two different invite accept pages. My admin app is hidden so people can't find it and currently I am just sending every person that registers on my site a link to my admin area. (I am aware if they try logging in it says no app access it is just a bit unprofessional on my part)