Add option to gracefully handle authentication failures

[bf]

Hello, I am using hapi-io in an auth: { mode: 'try' } environment. This means I have many routes that need authentication, but also some that don't need any.

I've added a new option to hapi-io called authModeTry (default false) which - when user authentication fails - feeds back false to hapi instead the error message authentication failed.

I will now try to add the pull request (first time, so I hope I get everything right).

[sibartlett]

Hi, thanks for the pull request.

You can simply omit the auth option when registering the hapi-io plugin. No authentication will be required to establish a socket.io connection, and authentication will still run on a per route basis.

I'll update the README to indicate that the auth option is optional.

[sibartlett]

Hi @bf, was my last reply useful? If so, can I close this issue?

[bf]

No it didn't help. If I omit "auth" option, I'd need to add auth strategy to dozens of routes, which is very cumbersome. Even more when I have set up the normal react app to just use auth: { mode:"try" }