Initiate user sync

It would be very helpful if we could initiate a user sync. If I am making a change to how users are mapped (adding in a new app, adjusting attributes, adding in new custom attributes, making changes due to changes in the applications), I have to wait 4 hours just to see if the change I made was successful. If there was an error, now I have to wait 8+ hours. In general this just impacts development time, but it has impacted production when applications change their attributes which has caused users to lose access until it synced correctly.