Add method to update contestants through admin UI

app/controllers/users_controller.rb

@@ -1,4 +1,6 @@
 class UsersController < ApplicationController
+  include CompletionsConcern
+
   before_action :set_user, only: %i[ destroy edit show update ]
 
   def index
@@ -51,6 +53,26 @@ class UsersController < ApplicationController
     authorize @user
   end
 
+  def update_contestants
+    authorize :user
+
+    total = 0
+    updated = 0
+    Contestant.all.each do |contestant|
+      if contestant.completions.length > 0
+        total += 1
+        contestant.completions.each do |completion|
+          completion.save
+        end
+        if extend_completions!(contestant)
+          updated += 1
+        end
+      end
+    end
+
+    redirect_to users_path, notice: "Updated contestants: #{updated}/#{total}"
+  end
+
   private
 
   def set_user