Hi, I am a developer for a website builder company and one of my clients request a website to allow customer to pay. I created an web-app with angular wich will be used only for our clients. I created a simple tokenization and then a charge with e-com api keys, but the I am getting CORS error. If We do not want to create a developer account, how do I avoid CORS? or, If is not possible to avoid CORS, do we have to create a developer account for our client??