customer-service/lib/customer_service_web/error_json.ex

defmodule CustomerServiceWeb.ErrorJSON do
  def render("404.json", _assigns) do
    %{errors: %{detail: "Not found"}}
  end

  def render("400.json", _assigns) do
    %{errors: %{detail: "Bad request"}}
  end

  def render("401.json", _assigns) do
    %{errors: %{detail: "Unauthorized"}}
  end

  def render("403.json", _assigns) do
    %{errors: %{detail: "Forbidden"}}
  end

  def render("422.json", %{message: message}) do
    %{errors: %{detail: message}}
  end

  def render("422.json", _assigns) do
    %{errors: %{detail: "Unprocessable entity"}}
  end

  def render("500.json", _assigns) do
    %{errors: %{detail: "Internal server error"}}
  end

  def render(_template, _assigns) do
    %{errors: %{detail: "Something went wrong"}}
  end
end