code: public boolean onBackPressed() {
          if (corporateSSO) {
              Log.d(TAG, "Removing the SSO Login Form, going back to the Username/Password Form.");
              resetDomain();
              showSSOMessage(true);
              return true;
          }
          return false;
      }
docs: Triggers the back action on the form.
  
  @return true if it was handled, false otherwise