We are migrating our website to Shopify. I have about 600 unique discount codes from our old site. These are one time use codes that were given out as prizes at various events last year. Some are for a discount percentage, others for a dollar amount. So far, the only way I have found to migrate them is to upload them one by one, which is obviously not a realistic option. There is an old thread that uses iMacros, but it doesn't seem to work on the current Shopify platform. Does anyone have a solution for this?