I have forgotten my iCloud Security Code
I have forgotten my 4 digit iCloud Security Code. However I do know my password. How do I recover my code?
iPhone 6s, iOS 10.1
On your iPhone, go to Settings → iCloud → Keychain and switch Keychain off then on again.
Tap "Approve with Security Code", tap "Forgot Code" and then tap "Reset".
Follow the instructions to reset iCloud keychain and create a new passcode.
Learned from Zinacef