Migration to add option to enable disable org signup through GH

db/migrate/20160819121416_add_github_auth_to_organizations.rb

@@ -0,0 +1,7 @@
+Sequel.migration do
+  change do
+    alter_table :organizations do
+      add_column :auth_github_enabled, :boolean, null: false, default: false
+    end
+  end
+end