Add output and confirmation to gitlab:two_factor:disable_for_all_users

lib/tasks/gitlab/two_factor.rake

@@ -2,8 +2,21 @@ namespace :gitlab do
   namespace :two_factor do
     desc "GitLab | Disable Two-factor authentication (2FA) for all users"
     task disable_for_all_users: :environment do
-      User.with_two_factor.find_each do |user|
-        user.disable_two_factor!
+      scope = User.with_two_factor
+      count = scope.count
+
+      if count > 0
+        puts "This will disable 2FA for #{count.to_s.red} users..."
+
+        begin
+          ask_to_continue
+          scope.find_each(&:disable_two_factor!)
+          puts "Successfully disabled 2FA for #{count} users.".green
+        rescue Gitlab::TaskAbortedByUserError
+          puts "Quitting...".red
+        end
+      else
+        puts "There are currently no users with 2FA enabled.".yellow
       end
     end
   end