Auto Generate password -- 2

Hello, I am Aamir from Singularity. We are about to launch our first Question Bank which will be in flip book format, generated in Heyzine. Interested students would be able to purchase from our Shopify store(non operational yet). So, the story is, after the purchase, I would need to send the personalized Password protected Flip book link generated in Heyzine to the respective e-mail Ids as well as whatsApp numbers(data to be collected from Shopify store).