How to remove the surroundings parenthesis from a String | Swift

Question

Why does code print with surrounding parenthesis and with the prefix int or string? For example:

code: string("Gate: 2312231")

How can I just have it print code: 2312231 and nothing more? Try the following code in Playgrounds to see the the printed values. I appreciate the help, let me know if there are any questions.

let data = """
[
  {
    "date": "2022-05-04",
    "code": 122312,
    "notes": "Take keys"
  },
  {
    "date": "2022-05-04",
    "code": "Gate: 2312231",
    "notes": "Take Box"
  }
]
""".data(using: .utf8)!

enum Code: Decodable {
    case int(Int)
    case string(String)
}

struct Item: Decodable {
    var date: Date
    var code: Code
    var notes: String

    enum CodingKeys: String, CodingKey {
        case date, code, notes
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        self.date = try container.decode(Date.self, forKey: .date)
        self.notes = try container.decode(String.self, forKey: .notes)

        if let value = try? container.decode(Int.self, forKey: .code) {
            self.code = .int(value)
        } else if let value = try? container.decode(String.self, forKey: .code) {
            self.code = .string(value)
        } else {
            let context = DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Unable to decode value for `code`")
            throw DecodingError.typeMismatch(Code.self, context)
        }
    }
}

let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd"

let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .formatted(formatter)

let items = try! decoder.decode([Item].self, from: data)

for item in items {
    print("date: \(item.date.description)")
    print("code: \(item.code)")
    print("notes: \(item.notes)")
    print()
}