update seeds

Author: dfelczak

db/seeds.rb

@@ -13,6 +13,6 @@
 end
 
 25.times do |n|
-  u = User.create!(email: "user#{n}@example.com", password: 'Secret123', confirmed_at: Time.now)
+  u = User.create!(email: "user#{n}@example.com", password: 'Secret123', confirmed_at: Time.now, tokens: nil)
   u.add_role n == 0 ? :admin : :user
 end