Iterate comma separated argument for \author

Question

How to define a macro that accepts comma separated arguments, iterates over the arguments and inserts some command or text between the arguments?

E.g. by checking if the current argument is not the first.

I would like to pass \mycommand{a,b,c} and get a \and b \and c.

Here is my example using \author and \and

\documentclass[]{article}
\usepackage{expkv-cs}
\ekvcHash\myauthor{author=,affiliation=,email=,}{%
  \begin{tabular}{ c }
    \ekvcValue{author}{#1}\
    \ekvcValue{affiliation}{#1}
  \end{tabular}
}
% this macro should have comma separated arguments instead of three fixed arguments
\newcommand*{\myauthorslist}[3]{%
  \author{
    \myauthor{#1} \and \myauthor{#2} \and \myauthor{#3} % this should be done by iterating the arguments
  }
}
\begin{document}
\myauthorslist
  {author={Author1},affiliation={University of City1}}
  {author={Author2},affiliation={University of City2}}
  {author={Author3},affiliation={University of City3}}
\title{mytitle}
\maketitle
\end{document}

I.e. pass the arguments like the following:

\myauthorslist{
  {author={Author1},affiliation={University of City1}}
  ,{author={Author2},affiliation={University of City2}}
  ,{author={Author3},affiliation={University of City3}}
  % ...
}

UPDATE: What I've tried so far:

\documentclass[]{article}
\usepackage{expkv-cs}
\ekvcHash\myauthor{long author=,long affiliation=}{%
  \begin{tabular}{ c }
    \ekvcValue{author}{#1}\
    \ekvcValue{affiliation}{#1}
  \end{tabular}
}
\ExplSyntaxOn
\NewDocumentCommand \myauthorslist { O{ \and } m } {
  \clist_use:nn { #2 } { #1 }
}
\ExplSyntaxOff
\begin{document}
\author{
  \myauthorslist{
    \myauthor{author={Author1},affiliation={University of City1}},
    ,\myauthor{author={Author2},affiliation={University of City2}}
    ,\myauthor{author={Author3},affiliation={University of City3}}
  }
}
\title{mytitle}
\maketitle
\end{document}

The previous is working. But I'd like to non repeat \myauthor and call it like the following:

\author{
  \myauthorslist{
    {author={Author1},affiliation={University of City1}},
    ,{author={Author2},affiliation={University of City2}}
    ,{author={Author3},affiliation={University of City3}}
  }
}

But I don't know how to use \myauthor in \myauthorslist. The following is not working:

\NewDocumentCommand \myauthorslist { O{ \and } m } {
  \clist_use:nn { #2 } { \myauthor{ #1 } } % <- this is not working!
}