Allow initiation of the customer account login flow from Hydrogen Store

[NickHazen]

It would solve a lot of issues for customizing the login process of the new customer account api, if we could initiate the 6 digit code with a mutation, and then provide the value as a parameter of the login request. From a UX standpoint, that would allow the user to enter their email address on the storefront. Once they've retrieved the 6 digit code, they could enter it into a form and be redirected to the Shopify login page, with the email and code pre-populated, allowing for a quick sign-in and redirect to the store.

[jamalsoueidan]

Good idea.

[NickHazen]

The new customer api is ideal in a lot of ways, except for the Shopify login screen. This doesn't meet my product owners expectations or branding standards, which means I must continue to use the old customer api.