docs/guides/auth/github.md


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Authentication guide - GitHub
===

1. Sign-in or sign-up for a GitHub account
2. Navigate to developer settings in your GitHub account [here](https://github.com/settings/developers) and select the "OAuth Apps" tab
3. Click on the **New OAuth App** button, to create a new OAuth App:

![create-oauth-app](../images/auth/create-oauth-app.png)

4. Fill out the new OAuth application registration form, and click **Register Application**

![register-oauth-application-form](../images/auth/register-oauth-application-form.png)

*Note: The callback URL is <your-hackmd-url>/auth/github/callback*

5. After successfully registering the application, you'll receive the Client ID and Client Secret for the application

![application-page](../images/auth/application-page.png)

6. Add the Client ID and Client Secret to your config.json file or pass them as environment variables
    * config.json:
      ````javascript
      {
        "production": {
          "github": {
              "clientID": "3747d30eaccXXXXXXXXX",
              "clientSecret": "2a8e682948eee0c580XXXXXXXXXXXXXXXXXXXXXX"
          }
        }
      }
      ````
    * environment variables:
      ````
      HMD_GITHUB_CLIENTID=3747d30eaccXXXXXXXXX
      HMD_GITHUB_CLIENTSECRET=2a8e682948eee0c580XXXXXXXXXXXXXXXXXXXXXX
      ````