Pre-fill Broadworks user ID in untrusted

Pre-fill Broadworks user ID in untrusted email flow

Currently in the untrusted provisioning flow where alternate email ID is not filled you cannot take advantage of enhanced login experience. There should still be a way to do this as once the user activates they link their Broadworks user ID to their email so we should already know that when they attempt to login. From there could pre-fill the user id to make it easier on the user.