Instacart sign-on
By default, your storefront uses the same sign-on service that is used by Instacart Marketplace. Customers log in to your storefront with the same email they use when logging in to Instacart Marketplace. They will receive a one-time-password (OTP) by email, which they must use to authenticate their log in.
The following image shows an example of a log in form and sign up form:
When a customer signs up, they receive an email to confirm their address.
The following image shows an example of the login flow: