# defmodule User do
#   use Parameter.Schema
#   alias Parameter.Validators

#   param do
#     field :first_name, :string, key: "firstName", required: true
#     field :last_name, :string, key: "lastName"
#     field :email, :string, validator: &Validators.email(&1)
#     has_one :address, Address do
#       field :city, :string, required: true
#       field :street, :string
#       field :number, :integer
#     end
#   end
# end