add header for alamofire

var urlRequest = URLRequest(url: URL(string: APIManager.baseURLString + result)!)
var token: String = "noToken"
if KeychainSwift().get(TOKEN) != nil {
token = KeychainSwift().get(TOKEN)!
}
urlRequest.httpMethod = method.rawValue
urlRequest.setValue(token, forHTTPHeaderField: "Authorization")