Fix login

src/main/resources/application.yml

@@ -20,6 +20,7 @@ spring:
           twitch:
             client-id: ${TWITCH_CLIENT_ID}
             client-secret: ${TWITCH_CLIENT_SECRET}
+            client-authentication-method: client_secret_post
             redirect-uri: "${TWITCH_REDIRECT_URI:{baseUrl}/login/oauth2/code/twitch}"
             authorization-grant-type: authorization_code
             scope: ["user:read:email"]
@@ -28,7 +29,7 @@ spring:
             authorization-uri: https://id.twitch.tv/oauth2/authorize
             token-uri: https://id.twitch.tv/oauth2/token
             user-info-uri: https://api.twitch.tv/helix/users
-            user-name-attribute: preferred_username
+            user-name-attribute: login
 
 management:
   endpoints: