Oauth in redux and express

Hi, I am currently working on a application at a job I just started a week ago. I have been asked to implement oauth 1.0 or 2.0 (they don't care which version) with their existing redux application. I'm familiar with redux and have used in the past plenty. However I've never used oauth before. So I began my research into what oauth is and what it tries to accomplish. From my understanding (correct me if I'm wrong) oauth connects users to platforms that they are already users of through tokens and links their accounts to the platform they want to use. I've went to github to see if there were any example projects I could learn from and I found the following:

- https://github.com/lynndylanhurley/redux-auth

- https://github.com/lynndylanhurley/redux-auth-demo

- https://github.com/r-park/todo-react-redux

Problem is I'm lost as these projects have alot more included into them beside oauth. I'm trying to find a barebone implementation of redux and oauth. I'm assuming I will also have to code some express stuff to handle processing tokens on the server as I've read in articles pointing that out. I'm new to this and it's not really sinking in how to do this. Does anyone have a barebones example of redux with oauth implemented so that I can understand how the oauth "flow" should work?