in src/main/scala/com/gu/hmac/HMACHeaders.scala [41:46]
def get(dateHeader: String): HMACDate = {
Try(dateHeader.fromRfc7231String) match {
case Success(dateTime) => HMACDate(dateTime)
case Failure(e) => throw new HMACInvalidDateError("Invalid Date Format: " + e.getMessage)
}
}