Saves the account persistently on a successful login, and extracts it when the activity starts
extracted getSavedAccount method
Extracted startAuthentication method, saves the account only if it was updated
Extracted the resetSavedAccount method
Extracted onFailedLogin method, resetting saved accounts on every failure
Exception fixes and debug logs
SharedPreferences - commit changes...
Hide the account details layout on automatic authentications
Merge branch 'save_login'