I am trying to use Zapier to create an custom integration for customers
The main goal is to create a Xero Sales Invoice automatically once a Firestore document has been created.
I'm looking for Zapier to handle the whole thing (Even if takes some dev on my part)
Using a "Sign in Xero" button, I am struggling find out how I would auth a customer and then save the token on firetore and return them back to our website