Adding Orcid badge to a paper

Question

I want to add the ORCID badge for the author of an article. I've copied the code exactly from this source: https://gugushvili.github.io/blog/2019/08/09/orcid

\documentclass{acmart}
\usepackage{lipsum}
\usepackage{tikz,xcolor,hyperref}
\definecolor{lime}{HTML}{A6CE39}
\DeclareRobustCommand{\orcidicon}{
    \begin{tikzpicture}
    \draw[lime, fill=lime] (0,0) 
    circle [radius=0.16] 
    node[white] {{\fontfamily{qag}\selectfont \tiny ID}};
    \draw[white, fill=white] (-0.0625,0.095) 
    circle [radius=0.007];
    \end{tikzpicture}
    \hspace{-2mm}
}
\foreach \x in {A, ..., Z}{
    \expandafter\xdef\csname orcid\x\endcsname{
        \noexpand\href{
            https://orcid.org/\csname orcidauthor\x\endcsname
            }
        {\noexpand\orcidicon}
    }
}
\newcommand{\orcidauthorA}{0000-0001-5446-5645}
\begin{document}
\title{OrcidProblem}
\author[Mickey Mouse]{Mickey Mouse\orcidA{}}
\authornote{lead author}
\affiliation{
  \institution{StackExchange}
}
\maketitle
\section{Introduction}
\lipsum
\end{document}

However, I get syntax errors:

• "Undefined control" at line 24, i.e. \begin{document}
• "Use of \begin doesn't match its definition" at line 31, i.e. \maketitle These errors can be ignored perhaps, but I'm also getting junk output in the result PDF of this form:

[lime, fill=lime] (0,0) circle [radius=0.16] node[white] ID; [white, fill=white] (-0.0625,0.095) circle [radius=0.007];tikzpicture[lime, fill=lime] (0,0) circle [radius=0.16] node[white] ID; [white, fill=white] (-0.0625,0.095) circle [ra-dius=0.007]; tikzpicture

I'm using Overleaf.