JSON API with Basic Auth in Swift 3

fetchResultsFromApi.swift

func fetchResultsFromApi() {
  let username = "username"
  let password = "password"

  let url = NSURL(string: "http://localhost:3000/api/v1/results.json")
  let request = NSMutableURLRequest(url: url! as URL)

  let config = URLSessionConfiguration.default
  let userPasswordString = "\(username):\(password)"
  let userPasswordData = userPasswordString.data(using: String.Encoding.utf8)
  let base64EncodedCredential = userPasswordData!.base64EncodedString(options: [])
  let authString = "Basic \(base64EncodedCredential)"
  config.httpAdditionalHeaders = ["Authorization" : authString]
  let session = URLSession(configuration: config)
  let task = session.dataTask(with: request as URLRequest) { (data, response, error) -> Void in
    let httpResponse = response as! HTTPURLResponse
    let statusCode = httpResponse.statusCode

    if (statusCode == 200) {
        print("Everyone is fine, file downloaded successfully.")
    } else {
        print(statusCode)
    }
  }
task.resume()
}