Make blacklist in application backend - if you in list you can't do registration -- 2

Hi there, I am an expert in Cloud back end development with more than two years of experience. From your scenario, I have the following observations: 1. Your registration process is most likely done in the React app using firebase authentication 2. The registration process and all successive pages are part of your React SPA and there are no requests to back end before registration is confirmed. Point (2) is a bit problematic. This means there's only one possible solution: 1. Creating a trigger for Firebase Authentication when a user is created. This means that the user may have finished registration. At this point, if the account is deleted, the user loses access to the site. I don't think there any other ways to do this without making some small changes in your back end. Let me know what you think of my offer. Thanks for your time and consideration.

I'll be happy to add the blacklisting functionality in your application, as per your specifications. Please share more detailed project specific requirements. I’ll make sure that your web/app will look elegant in all major devices, it’ll be faster and light-weighted (saving server costs), it’ll be robust to withstand cyber attacks and scalable as you grow your business. You pay at the very end when you are happy with the work. Please refrain from evaluating my quality of work by the quoted price, price never depends on quality, it depends on supply-demand curve. I quoted less price so I can build my reputation on this platform. Please taste my creative & dedicated service atleast once. My profile is new but I have years of experience in React, Redux, GraphQL, React Native, Node, PHP, Laravel, CI, Python, Django, AWS, etc. You get one year code warranty. Please contact for further discussion.