...
Once you get the access keys and you have in mind the basic concepts stated above, you are ready to start developing your application. Authentication with OAuth 2.0 is not a walk in the park, the recommended approach is to check out a piece of working code form /wiki/spaces/mailupapi/pages/36340621Samples and Wrappers.
Anyway, if you are not familiar with any of the programming language of our samples, or if you want to know more, you can have a look at the following chapter and also at the pages it refers to.
...