I've set up a Magento site with 5 websites each website has one store and each store has one store view. I am using subdomains for websites example: dev.test.com for default and foo.dev.test.com for other websites. I am looking for a way to share the customer info when switching websites.
first how to keep the customer connected when switching websites?
Second, how to transfer the cart products across websites? (PS: I am going to remove the products that don't exist on the site that the user switches to.) any help will be really appreciated