Add token to config/config-type

public/config.json

@@ -5,5 +5,6 @@
     "header": {
         "title": "Chatterbox Test Room",
         "avatar": "https://i.picsum.photos/id/907/200/200.jpg?hmac=SdeLZNONJ3CX-OB15hSXsCheWDC6yYac5N5VUJM7FIQ"
-    }
+    },
+    "token": "k9SL1R~GcdbjiFjC"
 }

src/types/IChatterboxConfig.ts

@@ -6,6 +6,8 @@ export interface IChatterboxConfig {
     username_prefix: string;
     // Configurations for header on chatterbox (containing title, avatar, minimize button)
     header: IHeader;
+    // Token needed for token-authenticated registration
+    token: string;
 }
 
 interface IHeader {