public string SignIn(string login, string password)
{
HttpConnector httpConnector = HttpConnector.GetInstance();
_tokenData = httpConnector.GetToken(login, password);
string errorMessage = httpConnector.LastErrorMessage;
if (errorMessage == null)
{
httpConnector.SetCredentials(_tokenData);
_userRoles = httpConnector.GetCurrentRoles();
errorMessage = httpConnector.LastErrorMessage;
}
return(errorMessage);
}