int AuthBy(const std::string & login, AUTH_BY::CALLBACK f, void * data);
int SendMessage(const std::string & login, const std::string & text, SIMPLE::CALLBACK f, void * data);
int CheckUser(const std::string & login, const std::string & password, SIMPLE::CALLBACK f, void * data);
int AuthBy(const std::string & login, AUTH_BY::CALLBACK f, void * data);
int SendMessage(const std::string & login, const std::string & text, SIMPLE::CALLBACK f, void * data);
int CheckUser(const std::string & login, const std::string & password, SIMPLE::CALLBACK f, void * data);