# Authentication guide - Twitter

*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 Twitter account

2. Go to the Twitter Application management page [here](https://apps.twitter.com/)

3. Click on the **Create New App** button to create a new Twitter app:  
   ![create-twitter-app](../../images/auth/create-twitter-app.png)

4. Fill out the create application form, check the developer agreement box, and click **Create Your Twitter Application**  
   ![register-twitter-application](../../images/auth/register-twitter-application.png)

   *Note:* you may have to register your phone number with Twitter to create a Twitter application

   To do this Click your profile icon --> Settings and privacy --> Mobile  --> Select Country/region --> Enter phone number --> Click Continue

5. After you receive confirmation that the Twitter application was created, click **Keys and Access Tokens**  
   ![twitter-app-confirmation](../../images/auth/twitter-app-confirmation.png)

6. Obtain your Twitter Consumer Key and Consumer Secret  
   ![twitter-app-keys](../../images/auth/twitter-app-keys.png)

7. Add your Consumer Key and Consumer Secret to your `config.json` file or pass them as environment variables:
  - `config.json`:
    ```javascript
    {
      "production": {
        "twitter": {
          "consumerKey": "esTCJFXXXXXXXXXXXXXXXXXXX",
          "consumerSecret": "zpCs4tU86pRVXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
        }
      }
    }
    ```

  - environment variables:
    ```sh
    CMD_TWITTER_CONSUMERKEY=esTCJFXXXXXXXXXXXXXXXXXXX
    CMD_TWITTER_CONSUMERSECRET=zpCs4tU86pRVXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    ```
