To enable login with Twtter you first have to create an application in the Twitter Developer Console. Then you need to copy the consumer key and secret into the Keycloak Admin Console. Log in to the Twitter Developer Console. Click the Create a new application button. Use any value for Name, Description and Website you want. Insert the social callback url in Callback URL. Then click Create your Twitter application. Now click on Settings and tick the box Allow this application to be used to Sign in with Twitter, then click on Update this Twitter application's settings. Now click API Keys tab. Copy API key and API secret from the Twitter Developer Console into the settings page in the Keycloak Admin Console as the Key and Secret. Then click Save in the Keycloak Admin Console to enable login with Twitter. Twitter doesn't allow localhost in the redirect URI. To test on a local server replace localhost with 127.0.0.1.