millheatclient-3.cs

public async Task<string> GetAccessToken(string authCode)
{
    httpClient.DefaultRequestHeaders.Remove("access_key");
    httpClient.DefaultRequestHeaders.Remove("secret_token");

    httpClient.DefaultRequestHeaders.Add("authorization_code", authCode);

    var requestUrl = $"share/applyAccessToken?password={Constants.Password}&username={Constants.Username}";
    var response = await httpClient.PostAsync(requestUrl, stringData);
    var result = await response.Content.ReadAsStringAsync();
    var jsonResult = JsonSerializer.Deserialize<ApplyAccessTokenResponse>(result);
    return jsonResult.Data.AccessToken;
}