public addUserQuery(Register r, String table, String[] columns) {
        
        tableUsed = table;
        columnsUsed = columns;
        
        this.r = r;
        
        String[] values = {
            r.getTfFirst().getText(),
            r.getTfLast().getText(),
            r.getTfUsername().getText(),
            r.getDecipheredPassword(r.getPfPassword())
        };
        
        valuesUsed = values;
    }