NetworkResponse.swift

    enum NetworkReponse: String, Error {  // Conform to Error
        case authenticationError = "You need to be authenticated first."
        case badRequest = "Bad Request"
        case outdated = "The url you requested is outdated."
        case failed = "Network request failed."
        case noData = "Response returned with no data to decode."
        case unableToDecode = "We could not decode the response."
    }