function _aws-auth {
  if [ "${#COMP_WORDS[@]}" != "2" ]; then
    return
  fi
  local aws_profiles
  aws_profiles="$(pcre2grep -O '$1' '(?>\[\s*profile )(\S+)(?>\s*\])' ~/.aws/config)"
  COMPREPLY=($(compgen -W "$aws_profiles" "${COMP_WORDS[$COMP_CWORD]}" ))
}

complete -F _aws-auth aws-auth