SWIFT Json check if object title exists - json

Question

My code checks if code: "this data" is not empty, how can I check also if code itself exists. Some responses might give me almost an empty JSON with just time stamp. So the var code won't be there.
Or is there a better way altogether to do this? as My JSON is
"Variable Based on text input" which leads to "code" which might not be there which will have "some info" or ""
Top of script:
struct Variables: Decodable {
var code: String
}
typealias DecoderX = [String: Variables]
Previous function sets inputs from user text which are cross checked with the database so GetInfo will only be called if UserDefault inputs are set.
func GetInfo() {
let Input1 = UserDefaults.standard.string(forKey: “UserInput1”) ?? “”
let Input2 = UserDefaults.standard.string(forKey: “UserInput2”) ?? “”
let Input3 = UserDefaults.standard.string(forKey: “UserInput3”) ?? “”
print(“Input Check 1: \(Input1) \(Input2) \(Input3)”)
// URL INFO With API key hidden
let jsonTask = URLSession.shared.dataTask(with: requestURL) { data, response, error in
if response == response {
if let data = data, let body = String(data: data, encoding: .utf8) {
do {
let json = try? decoder.decode(DeocderX.self, from: data);
DispatchQueue.main.async {
print(“Input Check 2: \(json![Input1]!.code) \(json![Input2]!.code) \(json![Input3]!.code)”)
if json?[Input1]?.code != nil {
print("Good Information 1")
} else {
print("Found Nothing 1")
}
if json?[Input2]?.code != nil {
print("Good Information 2")
} else {
print("Found Nothing 2")
}
if json?[Input3]?.code != nil {
print("Good Information 3")
} else {
print("Found Nothing 3")
}
}
// rest of code not applicable

Answer 1

You can use SwiftyJSON library. You can find it at this link
if let json = try? JSON(data: response.data!){
if json["yourKey"]["otherKey"].exists() {
print("exists")
}
}
Hope it helps...