To reauthorize your Shopify store's access credentials:
From your store settings page, click on the name of your Shopify store.
Click on the "Access credentials & integration settings." panel to expand it.
Enter your Shopify Store URL and click the "Authorize SKULabs" button.
If needed, login to your Shopify account.
In the window that appears on Shopify, click on "Install app"
Click the "Connect 'Your Store'" Button.
If you have any questions, please contact SKULabs support.