Via Their App Stores
Via Direct Signup to Cloudtxt
To avoid receiving an error message about your store’s URL, make sure that you input the URL correctly.
If you can’t log in your Shopify store, open the Shopify login page in another tab of your browser and complete the login process. When it’s done, get back to the Shopify Connect page and try to connect again.
If you receive an error message - contact us via the Contact Us form.