swift-post-login.swift

struct userResponseData: Decodable {
    let token:String?
    let username:String?
}

let loginUrlString = "https:yourapiurl"
guard let loginUrl = URL(string:loginUrlString) else { return }
var request = URLRequest(url:loginUrl)
request.httpMethod = "POST"

let bodyData = "username=\(username.text!)&password=\(password.text!)"

request.httpBody = bodyData.data(using: String.Encoding.utf8);

URLSession.shared.dataTask(with: request) { (data, res, err) in

do {

	let responseUser = try JSONDecoder().decode(userResponseData.self, from: data!)
                
   if let isValidLogginUser = jwtSuccessToken.success {
		print("valid user")
   } else {
		print("invalid user")
   }

}.resume()