No - Grab&Go is one of the few ordering flows that does not require login. The Grab&Go controller never calls Sprwt's login check, so a shopper can browse locations, dates and meals and check out as a guest; that's why the Grab&Go Drop-off Report shows Guest Checkout for orders with no linked account. This is different from the In Store Menu and the wholesaler's Purchase Stock page, both of which explicitly require the customer to be logged in before they can see any dates or meals. If you want every Grab&Go order tied to a customer profile, that has to be enforced by your site's general checkout/account settings, not by anything specific to Grab&Go.