 only be used on TCP/IP
          connections. When specified for local connections, peer
          authentication will be used instead.
          See <a class="xref" href="auth-ident.html" title="21.8. Ident Authentication">Section 21.8</a> for details.
         </p></dd><dt><span class="term"><code class="literal">peer</code></span></dt><dd><p>
          Obtain the client's operating system user name from the operating
          system and check if it matches the requested database user name.
          