I’m trying to write a class like this:

NeedsTeXFormat{LaTeX2e}[1994/12/01]
ProvidesClass{Bug}[2024/07/12 Bug]
LoadClass[a4paper,twoside,openbib]{article}
RequirePackage{expkv-opt}
RequirePackage{expkv-def}
ekvdefinekeys{myConf}{%
  store authors       = myConf@authors,
  store organisations = myConf@organisations,
  store title         = myConf@title
}
ekvoProcessLocalOptions{myConf}
RequirePackage{expl3}
RequirePackage{pgffor}
RequirePackage{authblk}

title{myConf@title}

newcounter{authorIndex}
setcounter{authorIndex}{0}
foreach g in myConf@authors {
  stepcounter{authorIndex}
  foreach a in g {
    author[thevalue{authorIndex}]{a}
  }
}

newcounter{affIndex}
setcounter{affIndex}{0}
foreach a in myConf@organisations {
  stepcounter{affIndex}
  affil[theaffIndex]{a}
}

renewcommandAuthsep{, }
renewcommandAuthand{, }
renewcommandAuthands{, }

in order to be able to use it like this :

documentclass[
authors={{auth 1.1, auth 1.2},{auth 2.1},{auth 3.1}},
organisations={org 1, org 2, org 3},
title={Some title}
]{Bug}

begin{document}
maketitle
a lot of text
end{document}

I would like to have all the authors separated by commas but I get this:

Can someone explain what I’m doing wrong ?

Thanks,

Jouke