如何使用django restframework作为移动应用程序的后端

I need to built an "API". Using django restframework. API has to support multiple platforms like mobile apps, webapps. API will be used as a backend which will store all information. But my problem is how do I access users information using API. I mean normally django has user model. And we access user related stuff using request.user. But how do I access request.user information using API. Please pardon me for asking such question. But as I am new to developing API for Mobile apps. I am facing difficulty.I need to built an "API". Using django restfram