Swift 3 IBM Lotus Domino authentication - swift

Question

I am very new to XCODE and iOS and I can't figure out how to do an authentication on IBM Domino server. I am trying to do a simple app to get some data from the server.
This is the latest version of my attempt. Bear in mind, that couldn't find information on what IBM Domino server needs. But I've done tons of authentications with javascript. I've deliberatly left the commented part, which is one of the attempts to do a login.
func doLogin(){
print("entered doLogin")
let myUrl: String = "https://url.com/names?login"
guard let url = URL(string: myUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!)else {
print("Error: cannot create URL")
return
}
var request = URLRequest.init(url: url)
request.httpMethod = "POST"
let params = ["Username":String(describing: self.username), "Password":String(describing: self.password)]
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
//URLSession.shared.dataTask(with: request) { (data:Data?, response:URLResponse?, error:Error?) in
// if let safeData = data{
// print("response: \(String(data:safeData, encoding:.utf8))")
// }
//}
//let postString = "Username=\(String(describing: self.username))&Password=\(String(describing: self.password))"
//request.httpBody = postString.data(using:String.Encoding.utf8)
request.timeoutInterval = 30.0
//print(request)
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration : configuration)
//let session = URLSession(configuration: configuration, delegate: self as! URLSessionDelegate, delegateQueue: nil)
let task = session.dataTask(with: request) {
(data : Data?, response:URLResponse?, error) in
// check for any errors
guard error == nil else {
print("error calling POST on url")
print(error!)
return
}
// make sure we got data
guard let responseData = data else {
print("Error: did not receive data")
return
}
do {
print ("responseData:")
print(responseData)
}
}
//print ("response:")
//print(task.response)
task.resume()