Sign token using joken

.tool-versions

elixir 1.9.2
erlang 22.1

README.md

mix deps.get
openssl ecparam -name secp256r1 -genkey -noout -out key.pem
iex -S mix

Play.run()

config.exs

use Mix.Config

config :joken,
  my_key: [
    signer_alg: "ES256",
    key_pem: Path.expand('./key.pem')
      |> Path.absname()
      |> File.read!()
  ]

mix.exs

defmodule Play.Mixfile do
  use Mix.Project

  def project do
    [
      app: :play,
      version: "0.0.1",
      elixir: "~> 1.9.2",
      elixirc_paths: elixirc_paths(Mix.env()),
      build_embedded: Mix.env() == :prod,
      start_permanent: Mix.env() == :prod,
      aliases: aliases(),
      deps: deps()
    ]
  end

  def application, do: []

  defp elixirc_paths(_), do: ["lib"]

  defp aliases, do: []

  defp deps do
    [
      {:joken, "~> 2.0"},
      {:jason, "~> 1.1"}
    ]
  end
end

play.ex

defmodule MyToken do
  use Joken.Config
end

defmodule Play do
  def run do
    signer = Joken.Signer.parse_config(:my_key)
    extra_claims = %{"db" => "sandy", "exp" => 2_000_000_000}
    token = MyToken.generate_and_sign!(extra_claims, signer)
    
    {:ok, token}
  end
end