Tidy up a few helpful method for user

Author: gnclmorais

app/controllers/application_controller.rb

@@ -105,15 +105,15 @@ def redirect_path
   end
 
   def authenticate_admin!
-    redirect_to root_path, notice: "You can't be here" unless logged_in? && current_user.has_role?(:admin)
+    redirect_to root_path, notice: "You can't be here" unless logged_in? && current_user.is_admin?
   end
 
   def authenticate_admin_or_organiser!
     redirect_to root_path, notice: "You can't be here" unless manager?
   end
 
   def manager?
-    logged_in? && (current_user.is_admin? || current_user.has_role?(:organiser, :any))
+    logged_in? && current_user.manager?
   end
 
   helper_method :manager?

app/models/member.rb

@@ -61,6 +61,10 @@ class Member < ApplicationRecord
 
   attr_accessor :attendance, :newsletter
 
+  def manager?
+    is_admin? || has_role?(:organiser, :any)
+  end
+
   def banned?
     bans.active.present? || bans.permanent.present?
   end