COServerResponse EditContact(std::string Location, std::string Data);
COServerResponse DeleteContact(std::string Location, std::string EntityTag);
COServerResponse GetServerEntityTagValue(std::string Location);
COServerResponse EditContact(std::string Location, std::string Data);
COServerResponse DeleteContact(std::string Location, std::string EntityTag);
COServerResponse GetServerEntityTagValue(std::string Location);