Signup API Returning 500 error

I realise I'm very new and may have missed something obvious, but I set up a Log In page endpoint, with the api and /auth/login which works fine.

I set up the same for /auth/signup and all I'm getting is a 500 error every time I try it. Swap the auth to login and it works. So I've probably missed a setting somewhere...

I'm using Xano with Bravo.

Can anyone nudge me in the right direction? 🙂.