Better documentation for JWT authentication

[gevera]

There is just a small paragraph about JWT in the docs. It doesn't do any service for one of most used ways of authentication nowadays. It lacks details about how to actually go about it. Maybe an example or a short tutorial of sort will be fine. Thank you

[kaushalyap]

Dear @dosco, do you have any plans to write documentation for authentication, this is very important IMHO, authentication docs for following would be awesome!

• JWT with HTTP only cookies
• Session based
• OAuth