I am new to mobile development using React Native. I would like to develop a notifications module as an iOS or Android application. It just so happens this module will interact with a web application I already have. In this case, I am only referencing the URL of the existing web application. The user will use the same login credentials. Once the user has logged in, they will receive notifications from the server-side of the existing web application when the status has changed or updated.
I have struggled with finding the solution for the last 3 weeks. I found some solution in using Firebase(for example) but I still have no idea how can my server interact with Firebase for sending notifications to unique user mobiles with the user credentials. Is there a recommended solution or any suggestion to boost my idea for this?