How to make the figure logo centered in the background, its a circle
\documentclass[aspectratio=169,xcolor=table]{beamer}
\usepackage{tikz}
\newsavebox\mybox
\savebox\mybox{% \setstretch{1.0}
\tikz[opacity=0.1]\node[align=center]{%
\includegraphics[width=7cm]{logo} \\
};
}
\usebackgroundtemplate{
\usebox\mybox}
\begin{document}
\begin{frame}
\end{frame}
\end{document}