Add user admin

app/controllers/admin/dashboard_controller.rb

@@ -0,0 +1,12 @@
+module Admin
+  class DashboardController < BaseController
+    def index
+      @user_count = User.count
+      @active_user_count = User.active.count
+      @application_count = Application.count
+      @active_application_count = Application.active.count
+      @group_count = Group.count
+      @recent_users = User.order(created_at: :desc).limit(5)
+    end
+  end
+end