Improve checkAppToken, add TODOs
Improve checkAppToken, add TODOs

trademob/ios_sdk,pitchtarget/adjust-ios-sdk,dannycxh/ios_sdk,yutmr/ios_sdk,nicolas-brugneaux-sociomantic/ios_sdk,akolov/adjust,mseegers/ios_sdk,BlueCrystalLabs/ios_sdk,Threadflip/adjust_ios_sdk