Implement User Authentication for Cloud-Based Application

We have software that is already built, however, we are looking to put it to work as a cloud-based ML application. Our application is built on ReactJS and it connects to a python backend. We are looking to inject user login actions to our application to make it individually work for each user. For this you may have to modify ReactJS and pythong backend code. The python code we develop is making use of Redis to schedule tasks, which requires expertise to write our authentication methods and eventually connect to ReactJS. We will provide you a link with the code base. You can tell us how long it will take you to complete and you can share with us your plan to execute. You will do the work on your machine and provide us the final source code. Our code requires a Linux based system. Important: when you authenticate please use an intermediate authentication link, not any login page. The intermediate link will take in the username and password and an application identifier, which tells the app to which parent application it should connect to. Then using an api from the parent application provided, user should be authenticated. A great example to keep in mind is gmail, user provide login info first then go to google auth page, then Google returns them back to gmail. That is what we need. We need our application to be ready to connect to connect with any app we use or anything we build. We need to pass a username/password.