Making use of OAuth2 clients

OAuth2 is a relatively common protocol for speaking with APIs. The golang.org/x/oauth2 package provides a pretty flexible client for working with OAuth2. It has subpackages that specify endpoints for various providers such as Facebook, Google, and GitHub.

This recipe will demonstrate how to create a new GitHub OAuth2 client and some of its basic usage.

Getting ready

Configure your environment according to these steps:

1. Refer to the Getting ready section of the Initializing, storing, and passing http.Client structs recipe.
2. Run the go get golang.org/x/oauth2 command.
3. Configure an OAuth Client at https://github.com/settings/applications/new.
4. Set the environment variables with your Client ID and Secret:
   1. export GITHUB_CLIENT="your_client"
   2. export GITHUB_SECRET="your_secret"
5. Brush up on the GitHub API documentation at https://developer.github.com/v3/.

How to do it...

These steps cover writing and running your application:

1. From your terminal/console application, create and navigate...