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+Authentication guide - Twitter
+===
+
+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:
+      ````
+      HMD_TWITTER_CONSUMERKEY=esTCJFXXXXXXXXXXXXXXXXXXX
+      HMD_TWITTER_CONSUMERSECRET=zpCs4tU86pRVXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+      ````