/code> is
   not specified, the server verifies the client certificate against its CA
   file only if a client certificate is presented and the CA is configured.
  </p><p>
   There are two approaches to enforce that users provide a certificate during login.
  </p><p>
   The first approach makes use of the <code class="literal">cert</code> authentication
   method for <code class="literal">hostssl</code> entries in <code class="filename">pg_hba.conf</code>,
   such that the certificate itself is used for aut