Support the ability for admins to delete users

app/controllers/admin/users_controller.rb

@@ -66,10 +66,14 @@ module Admin
 
     def edit; end
 
-    def delete
-      @user.destroy!
-      flash[:notice] = "User #{@user.id} (#{@user.emai}) successfully deleted."
-      redirect_to admin_users_path
+    def destroy
+      if @user.destroy
+        redirect_to admin_users_path,
+                    notice: "User #{@user.id} (#{@user.email}) deleted."
+      else
+        redirect_to admin_users_path,
+                    error: "User #{@user.id} (#{@user.emai}) could not be deleted. #{@user.full_messages.join(',')}"
+      end
     end
 
     private