Twilio Compadibility Tokens in elixir

twilio_token.ex

defmodule TwilioToken do
  import Joken

  @app Application.get_env(:speaker, :twilio_app)
  @sid Application.get_env(:ex_twilio, :account_sid)
  @token Application.get_env(:ex_twilio, :auth_token)

  def generate do
    %{scope: "scope:client:outgoing?appSid=#{@app}"}
    |> token
    |> with_iss(@sid)
    |> with_signer(hs256(@token))
    |> with_exp
    |> sign
    |> get_compact
  end
end