// ADMIN registration and authenticate
    void setAdminRegistration(const string& path, const string& login, const string& password)
    {
        if (login.size() == 0 and password.size() == 0)
        {
            throw exception("Error! Entered incorrectly login or password!");
        }
        else
        {
            //fstream in;
            //in.open(path, fstream::in | fstream::out | fstream::trunc);
            ifstream fin(path, ios::in);
            int size1 = sizeFile(path);
            if (!fin.is_open())
            {
                throw file_not_found("Error! File not found!");
            }
            else
            {
                Adminstrator temp(login, password);
                int temp_size = Adminstrator::adminID;
                fin >> temp_size;
                fin.ignore();
                getline(fin >> ws, temp.login);
                getline(fin >> ws, temp.password);
            }
            int size2 = sizeFile(path);
            if (size1 == size2)
            {
                throw exception("Error! The system crashed!\n");
            }
            fin.close();
        }
    }