       matches if the requested database has the same name as the
       requested user.  The value <code class="literal">samerole</code> specifies that
       the requested user must be a member of the role with the same
       name as the requested database.  (<code class="literal">samegroup</code> is an
       obsolete but still accepted spelling of <code class="literal">samerole</code>.)
       Superusers are not considered to be members of a role for the
       purposes of <code class="literal">samerol