 a database name, a user name,
   and the authentication method to be used for connections matching
   these parameters. The first record with a matching connection type,
   client address, requested database, and user name is used to perform
   authentication. There is no <span class="quote">“<span class="quote">fall-through</span>”</span> or
   <span class="quote">“<span class="quote">backup</span>”</span>: if one record is chosen and the authentication
   fails, subsequent records are not conside