How API calls are done with headers in swift

I want to securely provide my data from the API using JWT token.So Currently I have implemented security in the backend and each ajax call eith the header

url:"https://dataurl,        contentType : "application/json; charset=utf-8",        headers : TokenHeader(),

But now I want to send the same data to be consumed by an IOS App which is developed in swift.I am not a IOS mobile developer and when I look into how they make the rest calls I found that something like this can be done:

let todosEndpoint: String = "https://dataurl"guard let todosURL = URL(string: todosEndpoint) else {  print("Error: cannot create URL")  return}var todosUrlRequest = URLRequest(url: todosURL)todosUrlRequest.httpMethod = "GET"let newTodo: [String: Any] = ["title": "My First todo", "completed": false, "userId": 1]let jsonTodo: Datado {  jsonTodo = try JSONSerialization.data(withJSONObject: newTodo, options: [])  todosUrlRequest.httpBody = jsonTodo} catch {  print("Error: cannot create JSON from todo")  return}let session = URLSession.sharedlet task = session.dataTask(with: todosUrlRequest) {  (data, response, error) in  guard error == nil else {    print("error calling POST on /todos/1")    print(error)    return  }  guard let responseData = data else {    print("Error: did not receive data")    return  }

So now my question is like ajax call in my web app how to consume rest service from the mobile app side. Any help is appreciated?