With this conversation I was able to make an offline / private app work: https://github.com/Shopify/shopify-api-js/issues/700#issuecomment-1410780918 To be clear, here are the values that I used: `apiKey`, `apiSecretKey` (this one confusingly corresp...

I'm also new to Shopify, and so far it's been absolutely impossible for me to find an answer to this simple question, although I'm happy to see that I'm not alone. The "shopify-api-js" docs (on Github) is not particularly clear on the subject. I foun...