private Uri BuildUploadApiUri(out string authorizationheader, Dictionary <string, string>?parameters = null)
{
authorizationheader = OAuthClient.CreateOAuthAuthorizationToken(_apiUploadUri, _oauthConsumerKey, _oauthConsumerKeySecret, _accessToken, _accessTokenSecret, parameters: parameters, mode: "POST");
return(new Uri(_apiUploadUri));
}
