First crack at setting an owner for the tournament

app/models/user.rb

@@ -1,6 +1,8 @@
 class User < ActiveRecord::Base
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable and :omniauthable
+  has_many :tournaments
+
   devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :trackable, :validatable
 end