How to get a unique ID for each user of React Native app

Question

I'm building my first react native app and I want to add user authentication. I need to obtain a unique user id to add to the elements in my database, so only elements for that specific user show up in the app. I considered building something myself but I read an article that suggested this could introduce security flaws and as my app is working with sensitive data, I really don't want to do that.

I've looked into OAuth2 packages but I feel like I'm a bit out of my depth here, I just want something that allows the user to log in and I get a unique id back, I'm not interested in the user's details or using any external APIs, I just need a way to get the unique identifier.

What would be the best way to do this?

Thanks in advance.

Answer 1

You should use JWT. Refer to this article: Building a React Native JWT Client: API Requests and AsyncStorage

You can see what is JWT in here: JSON web token | JWT