Yelp请求不起作用

Question

当我在邮差中做同样的请求时一切都很好但是当我在Alamofire中尝试时我得到一个错误。 我是快速请求Alamofire的用户。这是我的代码。

let parameters: Parameters = ["term": searchTerm as AnyObject, "location": "Washington DC" as AnyObject]
//        let headers: HTTPHeaders = [tokenType!: accessToken!]
        Alamofire.request("https://api.yelp.com/v3/businesses/search", method: .get, parameters: parameters, encoding: JSONEncoding.default, headers: ["Authorization": "Bearer Access_token_************************"])

错误文字：

{
    error =     {
        code = "VALIDATION_ERROR";
        description = "Please specify a location or a latitude and longitude";
    };