[BugBash][CLI]no response in client event command

[juniwang]

Describe the bug

[CLI]no response in client event command. Either Success or Failure should be returned. Or any other output which helps debug needs to be returned. However it shows nothing. I don't know what happened.

To Reproduce

• Open Cloud Shell on Azure Portal
• Create a Web PubSub resource using az webpubsub create ...
• Start the client: az webpubsub client start --hub-name <hub> -g <group> -n <name>
• Send event to event handler: event name message
• Nothing happens.

Exceptions (if any)

• Should return one of the following: success, failure, error etc with helpful debug info in case of failure/error.
• Better to have some way to set log/output level.

Further technical details

• SDK and its version you use

[zackliu]

https://github.com/Azure/azure-cli-extensions/pull/4049