wip: order checkout

app/models/user.rb

@@ -22,6 +22,7 @@ class User < ApplicationRecord
   # Relationships
   has_many :events, dependent: :destroy
   has_many :tickets, dependent: :destroy
+  has_many :orders, dependent: :destroy
 
   # Validations
   validates :last_name,   length: { minimum: 3, maximum: 12, allow_blank: true }