var semaphore = DispatchSemaphore (value: 0)
let parameters = "{\n\t\"cardNo\":\"4111111111111111\",\n\t\"cardOwner\":\"Test Test\",\n\t\"expireMonth\":\"12\",\n\t\"expireYear\":\"20\",\n\t\"cvv\":\"123\",\n\t\"subscriberId\":\"7\",\n\t\"redirectUrl\":\"https:/www.example.com/callback/save-card\"\n}"
let postData = parameters.data(using: .utf8)
var request = URLRequest(url: URL(string: "https://api.zotlo.com/v1/subscription/change-card")!,timeoutInterval: Double.infinity)
request.addValue("***", forHTTPHeaderField: "AccessKey")
request.addValue("***", forHTTPHeaderField: "AccessSecret")
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("6", forHTTPHeaderField: "ApplicationId")
request.addValue("tr", forHTTPHeaderField: "Language")
request.httpMethod = "POST"
request.httpBody = postData
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data else {
print(String(describing: error))
print(String(data: data, encoding: .utf8)!)