I updated my Xcode to version 8 after iOS 10 release. Apple made some changes in code signing process and it is now available in general section of target settings. But the
Select the Target --> General --> Signing --> select the desired Team (It must the Super account)
Then select the Build Settings in Target, keep the Development team with the same with Selected team. Set the Provisioning Profile with Automatic and Code Signing Identity with iOS Developer.
Select the Project --> Build Settings. Set the Provisioning Profile and Code Signing Identity with Details information