Fix typo

JWT token -> JWT

Author: changeworld

articles/azure-web-pubsub/concept-service-internals.md

@@ -197,7 +197,7 @@ The maximum allowed message size for one WebSocket frame is **1MB**.
 
 #### Authentication workflow
 
-Client uses a signed JWT token to connect to the service. The upstream can also reject the client when it's `connect` event handler of the incoming client. The event handler authenticates the client by specifying the `userId` and the `role`s the client has in the webhook response, or decline the client with 401. [Event handler](#event-handler) section describes it in detail.
+Client uses a signed JWT to connect to the service. The upstream can also reject the client when it's `connect` event handler of the incoming client. The event handler authenticates the client by specifying the `userId` and the `role`s the client has in the webhook response, or decline the client with 401. [Event handler](#event-handler) section describes it in detail.
 
 The following graph describes the workflow.