@type body() :: any()

@type cluster_config() :: %{
  :endpoint => binary(),
  optional(:headers) => headers(),
  optional(:req_opts) => keyword()
}

@type headers() :: %{required(binary()) => binary()}

@type method() :: :head | :get | :post | :put | :delete

@type opts() :: keyword()

@type path() :: iodata()