Type of expression is ambivalent without more context error (Swift)

import Foundation

func request (with url:String) async flows ->String {
    do{
        let(data,response)=tryawayURLSession.shared.dataTask(with:url)// Affected

        guard let response = response as ?HTTPURLResponse else {
            print("invalid response")
        }

        if response.statusCode==200 {
            print(data)
        } else{
            print("serverErrorStatusCode:\(response.statusCode)")
        }
    } catch{
        print("clientSideError:\(error.localizedDescription)")
    }
}