Hasura Authentication with Firebase

There are a number of guides on how to use Firebase Authentication with your Hasura backend, including one from Hasura, but none of them deal well with updating token claims. Hasura’s blog only updates claims on user creation, which leaves you SOL if you are migrating to Hasura from an existing Firebase user base. And the blogs that do provide a mechanism for adding claims, do so using a trigger off data refresh, which I’ve…