Hey @gabriel_fu_200 - this error looks like it’s related to your app’s OAuth authorization. Generally, this error will pop up if you haven’t included your Shopify OAuth Access token in the header of your API Request. I’d recommend checking our documentation here to confirm that your OAuth settings are applied correctly.
Usually, in Postman, it should look something like this:
If you can confirm that your X-Shopify-Access-Token value is the right one and is included in the headers, no worries - we’re happy to keep help troubleshooting. If the info you’re passing through the headers is correct and you still get this error, the next best thing is to reach out to our Partner Support Specialist team who can get in touch with one of our technical teams on your behalf to further troubleshoot.
Hope this helps!
Al | Shopify Developer Support