Please implement an email verification step before registration for sub-accounts. We are receiving numerous fake and junk emails; verifying emails will assist us in retargeting customers and preventing numerous temporary accounts for both us and Boomerangme. If this is not feasible at the moment, my suggestion is to permit us to disable registration so that each sub-account can be activated manually. This way, we can design our own verification workflow using tools like Make or Pabbly.