Required software development freelancer for Consulting on authentication solution using Auth0 job

I am looking for 1-2 hours consult.
I want to manage the users on auth0.
There should be no sign-up form.
My users should type phone-number and password (which is their driving license number) from a few sources:
- bot
- mobile app
- wordpress

On click of Login:
- If they have existing user then ok.
- if not (newUser) I want Auth0 to check a custom authorizer that I will write and if I approve that there is such CUSTOMER entity on my CRM, then I want Auth0 to create a user for them based on the details my custom authorizer will respond, and log them in without the user experience a "signup" experience.
That custom authorizer I'm talking about will Call the CRM and ask a question. The CRM is not a player in the eyes of Auth0.

I am looking for 1-2 hours consult to guide me on how to design this using Auth0 tools.

Skills & Expertise Required

software development