@spec add_member(binary(), binary(), member_status(), binary()) ::
  {:ok, map()} | {:error, binary()}

@spec add_member(binary(), binary(), member_status(), binary(), map(), map()) ::
  {:ok, map()} | {:error, binary()}

@spec all(binary()) :: {:ok, [map()]}

@spec destroy_member(binary(), binary(), binary()) ::
  {:ok, map()} | {:error, binary()}

@spec members(binary(), binary()) :: {:ok, map()} | {:error, binary()}