     GenServer.start_link(__MODULE__, :ok, name: Aelita2.GitHub)
   end
 
+  @installation_content_type "application/vnd.github.machine-man-preview+json"
   @content_type_raw "application/vnd.github.v3.raw"
   @content_type "application/vnd.github.v3+json"
 

    end
    %{body: raw, status_code: 200, headers: headers} = HTTPoison.get!(
      url,
      [{"Authorization", "token #{token}"}, {"Accept", @content_type}],
      [params: params])
    repositories = Poison.decode!(raw)["repositories"]
    |> Enum.map(&Aelita2.GitHub.Repo.from_json/1)

  end

  @token_exp 400

  defp installation_config do
    :aelita2
