Add example for async auth with querystring params

[trodrigues]

Simple workflow that uses querystring parameters to determine if a user can look at a page or not. Parameters can come from a form submission, or from an url with those parameters in.

While I understand this is definitely not the best way to do any sort of authentication, I was recently working on an app where this was desirable.

I extracted this flow out of that small app where the usage workflow can be something like:

• new user comes in and uses the form to authenticate
• user can then share the url with the auth parameters in the querystring if desired

If this is too much for an example I can try and slim it down to an async onEnter example, as that is my main reasoning for adding this. As far as I can tell there is currently no example which demonstrates that.

[trodrigues]

Also as an aside, I have no idea why gh is highlighting a bunch of stuff in the code in red.

[timdorr]

This single quote is why it's all red.

[trodrigues]

Would I need to escape it or something? Atom didn't complain, and I also don't think it should. Unless these strings inside of JSX do need some special treatment.

[timdorr]

Nah, it's just some funkiness with Linguist and its parsing of JSX within Javascript.

[timdorr]

@trodrigues Just to make this not so annoying, let's change the text to:

Hey, I see you are authenticated.

[trodrigues]

Done (I amended the commit)

[timdorr]

👍