Shared SSO between apps

When setting up SSO for a client's active directory, you normally need to provide them with an Entity ID from our platform in the form of `https://saml.crowdcomms.com/<unique identifier>`. That unique identifier is specific per app. What this means is that clients can only access 1 app per active directory, and they typically re-create and re-populate new active directories if they have multiple apps with us.

There is now capability to share an active directory among multiple apps:

• Let the client choose any entity ID as long as it starts with `https://saml.crowdcomms.com/` eg `https://saml.crowdcomms.com/dlt`
• Have them set that as our Entity ID in their active directory
• Contact a dev to override the app to use that new, custom suffix (until the CMS gains the field to override this)