If APP client use the SDK of Gaming Graph Domain, APP server have to request the URL of Gaming Graph Domain, or add 'GG|' in front APP_ID at Facebook\FacebookApp@getAccessToken.
This PR privode a simple way to toggle to use Gaming Graph URL.
Reference Gaming Graph Domain (graph.fb.gg)
If APP client use the SDK of Gaming Graph Domain, APP server have to request the URL of Gaming Graph Domain, or add 'GG|' in front APP_ID at Facebook\FacebookApp@getAccessToken. This PR privode a simple way to toggle to use Gaming Graph URL. Reference Gaming Graph Domain (graph.fb.gg)