enable 2FA for manager

when trying to access manager, if superadmin did'nt enable otp, he/she is redirected to a page to enable 2FA. When superadmin is enabling 2FA, he has to to scan a qrcode with the 2FA application client. And afterwards, the superadmin has to log in with email, password and OTP code.

spec/models/administration_spec.rb

@@ -34,4 +34,31 @@ describe Administration, type: :model do
       end
     end
   end
+
+  describe 'enable_otp!' do
+    let(:administration) { create(:administration, otp_required_for_login: false) }
+    let(:subject) { administration.enable_otp! }
+
+    it 'updates otp_required_for_login' do
+      expect { subject }.to change { administration.otp_required_for_login? }.from(false).to(true)
+    end
+
+    it 'updates otp_secret' do
+      expect { subject }.to change { administration.otp_secret }
+    end
+  end
+
+  describe 'disable_otp!' do
+    let(:administration) { create(:administration, otp_required_for_login: true) }
+    let(:subject) { administration.disable_otp! }
+
+    it 'updates otp_required_for_login' do
+      expect { subject }.to change { administration.otp_required_for_login? }.from(true).to(false)
+    end
+
+    it 'nullifies otp_secret' do
+      administration.enable_otp!
+      expect { subject }.to change { administration.reload.otp_secret }.to(nil)
+    end
+  end
 end