Ensure that the Postscript Shopify App is installed on your Shopify store before proceeding with the following steps.
Obtaining the Shop API Key
Once you have installed the Postscript Shopify App, navigate to your shop's API settings page. Click the Create security key pair button to generate a new API key pair:
Copy the Private key value that we'll use in the next step (it should look something like sk_1234567890abcdef1234567890abcdef).
Adding the Postscript Channel
In your site's view page, add the Postscript channel and enter a name for the channel you're creating.
In the Postscript Shop Token field, paste the private key from the previous step and click Save & Deploy. You're now done adding Postscript!