i want use application/x-www-form-urlencoded body Parameters, but it doesn`t work

[PaPazhao]

func send() {
    let request = DMLoginOutRequest(type: "login", userName: "15311444509", psw: "5888913")
    Session.send(request) { (sesult) in
        print(sesult)
    }
}

struct DMLoginOutRequest: Request {
    
    let type: String
    let userName: String
    let psw: String
    
    typealias Response = UserInfo
    
    var method: HTTPMethod {
        return .post
    }
    var path: String {
        return "/v2/auth/login"
    }
    
    func response(from object: Any, urlResponse: HTTPURLResponse) throws -> UserInfo {
        return try UserInfo(object: object)
    }
    
    var parameters: Any? {
        return [
            "password" : psw,
            "username" : userName]
    }
 
}

extension DMLoginOutRequest {
    var headerFields: [String : String] {
        return [
            "Content-Type" : "application/x-www-form-urlencoded; charset=utf-8",
            "Accept-Language" : "zh-Hans-CN;q=1.0",
            "Accept-Encoding" : "gzip;q=1.0, compress;q=0.5"
        ]
    }

    var bodyParameters: BodyParameters {
        return FormURLEncodedBodyParameters(formObject:  parameters as! [String : Any])
    }
}

extension DMLoginOutRequest {
    var baseURL: URL {
        return URL(string: "http://api.52toys.com")!
    }
}

[PaPazhao]

POST /v2/auth/login HTTP/1.1
Host: api.52toys.com
Content-Type: application/x-www-form-urlencoded; charset=utf-8
Connection: keep-alive
Accept: application/json
User-Agent: DM78/1.0 CFNetwork/758.5.3 Darwin/15.6.0
Accept-Language: zh-Hans-CN;q=1.0
Accept-Encoding: gzip;q=1.0, compress;q=0.5
Content-Length: 37

password=5888913&username=15311444509

[PaPazhao]

public extension Request {
    public var parameters: Any? {
        return nil
    }

    public var queryParameters: [String: Any]? {
        guard let parameters = parameters as? [String: Any], method.prefersQueryParameters else {
            return nil
        }

        return parameters
    }

    public var bodyParameters: BodyParameters? {
        guard let parameters = parameters, !method.prefersQueryParameters else {
            return nil
        }
        return FormURLEncodedBodyParameters(formObject: parameters as! [String : Any])
//        return JSONBodyParameters(JSONObject: parameters)
    }

    public var headerFields: [String: String] {
        return [:]
    }

    public var dataParser: DataParser {
        return JSONDataParser(readingOptions: [])
    }

    public func intercept(urlRequest: URLRequest) throws -> URLRequest {
        return urlRequest
    }

[ishkawa]

Could you explain how it doesn't work?
HTTP request which you paste looks correct.

[ishkawa]

Just closed this issue now. Feel free to reopen this if anyone still encounters the same issue!