user.ex

defmodule Sling.User do
  use Sling.Web, :model

  schema "users" do
    field :username, :string
    field :email, :string
    field :password_hash, :string

    timestamps()
  end

  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, [:username, :email, :password_hash])
    |> validate_required([:username, :email, :password_hash])
    |> unique_constraint(:username)
    |> unique_constraint(:email)
  end
end