We're currently running associate_lead via the Munchkin API when a user signs up for our app and also creating an account in SF. This account gets synced to Marketo but does not merge with the lead that we created via the Munchkin API (even though they both have the same email). Does anyone have any good solutions for syncing leads created in SF with annonymous leads in Marketo? (so that we can retain web acticity from pre signup). Thanks!