Translation method in my push notification Azure Function

run.csx

static async Task<string> TranslateText(string inputText, string language, string accessToken)
{
    string url = "http://api.microsofttranslator.com/v2/Http.svc/Translate";
    string query = $"?text={System.Net.WebUtility.UrlEncode(inputText)}&to={language}&contentType=text/plain";

    using (var client = new HttpClient())
    {
        // Set API key
        client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", accessToken); 
        
        var response = await client.GetAsync(url + query);
        var result = await response.Content.ReadAsStringAsync();

        if (!response.IsSuccessStatusCode)
            return "Error: " + result;

        System.Xml.XmlDocument xmlResponse = new System.Xml.XmlDocument();
        xmlResponse.LoadXml(result);

        // Return the translation
        return xmlResponse.InnerText;
    }
}