You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: signup_spec.rb
    path of file: ./repos/Hours/spec/models
    
    the code of the file until where you have to start completion: describe Signup do
  it "creates an account and a user" do
    signup = Signup.new(signup_params)
    signup.save

    expe
    
  def signup_params(overrides = {})
    {
      first_name: overrides[:first_name] || "John",
      last_name: "Zoidberg",
      email: "zoidberg@planetexpress.co.uk",
      password: "whoop whoop whoop",
      password_confirmation: "whoop whoop whoop",
      subdomain: "whynotzoidberg"
    }
  end