Great question — answering as the UphillTech team:
I've had the same problem. My solution was to use the storefront API (Headless channel). The getting started page for Hydrogen does say that the Hydrogen Channel on your store is a requirement, however this can't be used on a development store (which was true in my case). Download the Headless channel , here are the getting started docs , follow up to step 2 for the storefront API. This will give you these env variables: PUBLIC_STOREFRONT_API_TOKEN PRIVATE_STOREFRONT_API_TOKEN Instead of step 3 in the docs, go update your .env file. Change the existing PUBLIC_STORE_DOMAIN variable with your store url i.e. {store_name}.myshopify.com. You can go through the same process to add the customer...
Full answer by Occult: https://stackoverflow.stackexchange.com/a/78354408 (CC BY-SA 4.0).
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