pgfplotstable version of this table

Question

Can somebody help me with a pgfplotstable version of th table.

\documentclass{article}

\begin{document}

\begin{table}
\centering
\begin{tabular}{cc|cc} 
\hline
\multicolumn{4}{c}{Header}                        \\ 
\hline
\multicolumn{2}{c|}{H1} & \multicolumn{2}{c}{H2}  \\ 
\hline
A & B                   & A & B                   \\
1 & 2                   & 3 & 4                   \\
5 & 6                   & 7 & 8                  
\end{tabular}
\end{table}
\end{document}
 

Here is my rudimentary attempt which does not produce the desired table.

\documentclass{article}
\usepackage{pgfplots, pgfplotstable}
\usepackage{filecontents}
\usepackage{booktabs}

\begin{filecontents*}{data.dat}
    A   B   A   B
    1   2   3   4
    5   6   7   8
    
\end{filecontents*}

\pgfplotstableset{% global config, for example in the preamble
    every last row/.style={after row=\bottomrule},
}

\begin{document}
    \pgfplotstabletypeset[every head row/.style={before row={
            \toprule},
        after row=\midrule},
    ]{data.dat}
\end{document}