Please update documentation

[mcgiany]

Hi,

it looks like your documentation is outdated. I follow your example for client and without setting correct version in init method i end up with FB error "init is not called with valid version."
When i use valid version and click on login i end up in error facebook page "Sorry, something went wrong." but i cant identify what is the problem.

[z5yl]

I just installed this library and I was also getting the "Sorry, something went wrong" issue. What solved it for me was adding app test users under the "App Roles" section. I was then able to login as one of the added test users. Facebook requires apps in development to add users explicitly as testers.