Fix issue with custom domains in appliance

[mcastany]

✏️ Changes

Custom domains in appliance was not working (reported by a customer). The appliance has some settings that are different from cloud which made it difficult to troubleshoot.

Issue:

• auth0 SDK on the front end side is configure with the custom domain - https://github.com/auth0-extensions/auth0-delegated-administration-extension/blob/master/client/actions/auth.js#L7-L13
• the authentication middleware was not configured to use the custom domain - https://github.com/auth0-extensions/auth0-delegated-administration-extension/blob/master/server/routes/api.js#L71

That mismatch configuration was causing the extension to fail to authenticate the user, throwing the reported error here - https://github.com/mcastany/auth0-delegated-administration-extension/blob/master/server/lib/middlewares/requireScope.js#L6

🎯 Testing

✅This change has been tested in a Webtask
🚫This change has unit test coverage
🚫This change has integration test coverage
🚫This change has been tested for performance

🚀 Deployment

Can this change be merged at any time? What will the deployment of the change look like? Does this need to be released in lockstep with something else?

✅This can be deployed any time