in anghammarad/src/main/scala/com/gu/anghammarad/serialization/Serialization.scala [142:148]
private[serialization] def parseContact(key: String, value: String): Try[Contact] = {
key match {
case "email" => Success(EmailAddress(value))
case "hangouts" => Success(HangoutsRoom(value))
case _ => Fail(s"Unable to match keys to known contact methods")
}
}