From https://once.com/writebook

app/models/first_run.rb

@@ -0,0 +1,11 @@
+class FirstRun
+  ACCOUNT_NAME = "Writebook"
+
+  def self.create!(user_params)
+    account = Account.create!(name: ACCOUNT_NAME)
+
+    User.create!(user_params.merge(role: :administrator)).tap do |user|
+      DemoContent.create_manual(user)
+    end
+  end
+end