Authentication guide - GitHub === ***Note:** This guide was written before the renaming. Just replace `HackMD` with `CodiMD` in your mind :smile: thanks!* 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 /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 ````