Private Hub Registration Link

I'm struggling with my audience getting the Login in emails from Searchie, but do NOT desire to use Searchie as a trigger with Zapier because there aren't enough actions to make it work to move people into the correct ConvertKit tag or sequence. This has been a constant challenge with having multiple hubs. The solution is much like what Wishlist does... a private hub registration link that I can add to my ConvertKit sequence confirmation email so they can register within my email. This keeps my hub secure but not allowing everyone to register for it, because the registration link is private and only available in the admin section of the hub. Would love help moving this vote up to get attention and a solution.