lib/credentials.ex
defmodule ExDeltaExchange.Credentials do
@type api_key :: String.t()
@type api_secret :: String.t()
@type t :: %__MODULE__{
api_key: api_key,
api_secret: api_secret
}
@enforce_keys ~w[api_key api_secret]a
defstruct ~w[api_key api_secret]a
end