void setAdminAuthenticate(const string& path, const string& login, const string& password)
    {
        fstream fs;
        fs.open(path, fstream::in | fstream::out | fstream::binary);
        if (!fs.is_open())
        {
            throw file_not_found("Error! File not found!");
        }
        else
        {
            int temp_size = 0;
            fs.read((char*)& temp_size, sizeof(int));
            if (temp_size == 0)
            {
                throw exception("Error! You are not registered in the system!");
            }
            else
            {
                string temp_login = "";
                string temp_password = "";
                fs.read((char*)& temp_login, sizeof(string));
                fs.read((char*)& temp_password, sizeof(string));
                if (temp_login == login and temp_password == password)
                {
                    m_login = login;
                    m_password = login;
                }
                else
                {
                    throw exception("Error! You entered incorrectly login or password!");
                }
            }
        }
        fs.close();
    }