To authenticate a Shopify element instance you must set up a store and be a Shopify Partner. If you are a developer building a store for a client, then you will need to acquire the shop name from your client
To set up the API provider:
After you sign up, from the Dashboard > Apps, click Create App.
Fill out the App Information. In the App URL enter your application callback URL, and then click Create App.
Under App Info
> App Credentials
, copy the API key and API secret key.