public TwitterClient(int portalId, AuthMode mode)
: base(portalId, mode, "Twitter")
{
AuthorizationEndpoint = new Uri("https://api.twitter.com/oauth/authorize");
RequestTokenEndpoint = new Uri("https://api.twitter.com/oauth/request_token");
RequestTokenMethod = HttpMethod.POST;
TokenEndpoint = new Uri("https://api.twitter.com/oauth/access_token");
MeGraphEndpoint = new Uri("https://api.twitter.com/1.1/account/verify_credentials.json");
AuthTokenName = "TwitterUserToken";
OAuthVersion = "1.0";
LoadTokenCookie(String.Empty);
}