newsapi | Go client for newsapi | REST library

    import 'dart:convert';
    import 'package:http/http.dart' as http;
    import 'package:newsapi_project/artical.dart';
    
    
    class News{ 
      List news =[];
      Future getNews()async{
       String url="https://newsapi.org/v2/top-headlines?sources=techcrunch&apiKey=8efc3612216c44ccba7a8251dfbed587";
       var response=await http.get( url); //here its throwing the error//
       var jsonData= jsonDecode(response.body);
       if (jsonData["status"]=="ok"){
         jsonData["articles"].forEach(element){ //=> and even to in .forEach//
           if(element["urlToImagel"] != null && element["description"] != null ){
    
             ArticalModel articalmodel = ArticalModel(
               title:element["title"],
               author:element["author"],
               description:element["description"],
               url:element["url"],
              urlToImage:element["urlToImage"],
              content:element["content"]
             );
             news.add(articalmodel);
           }
         };
       }
      }
    
    }

data class NewsResponse(
    val articles: List,
    val status: String,
    val totalResults: Int
)   

data class Source(
    val id: String,
    val name: String
)

data class Article(
    val author: String,
    val content: String,
    val description: String,
    val publishedAt: String,
    val source: Source,
    val title: String,
    val url: String,
    val urlToImage: String
)

object RetrofitHelper {

    fun getInstances():Retrofit{
        return Retrofit.Builder()
            .baseUrl("https://newsapi.org/")
            .addConverterFactory(GsonConverterFactory.create())
            .build()
    }
}

interface NewsService {

 @GET("v2/everything?")

 suspend fun getNews(@Query("country")country:String,@Query("page")page:Int,@Query("apiKey")apiKey:String):Response

}