How to solve this issue
Ambiguous reference to member 'dataTask(with:completionHandler:)'
    guard let requestUrl = URL(string:"http://www.digi.com/laravel_api_demo/api/demoapi") else { return }
    let request = NSMutableURLRequest(url: requestUrl)
    request.httpMethod = "POST"
    let postString = "firstName=James&lastName=Bond"
    request.httpBody = postString.data(using: String.Encoding.utf8)
    let task = URLSession.shared.dataTask(with: request){ (data, response, error) in
        if error != nil
        {
            //print(error)
            return
        }
        //You can print out response object
        print("response = \(response)")
        //Print out response body
        let responseString = String(data: data, encoding: NSUTF8StringEncoding)
        print("response data = \(responseString)")
        var err: Error?
        var json = JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? NSDictionary
        if let parseJSON = json {
            var firstNameValue = parseJSON["firstName"] as? String
            print("first name value = \(firstNameValue)")
        }
    }
    task.resume()
}
 
     
    
