protected Uri BuildAuthenticateUri(AuthenticationPermissions scope, ResponseType responseType)
{
var builder = new HttpUriBuilder(AuthenticationUrl);
builder.AddQueryStringParameter("client_id", this.ClientId);
builder.AddQueryStringParameter("response_type", responseType.ToString().ToLower());
builder.AddQueryStringParameter("scope", scope.GetParameterValue());
builder.AddQueryStringParameter("redirect_uri", RedirectUri);
return builder.Build();
}
