refs #15245 [fid_bbi] fixup login form

themes/fid_bbi/templates/Auth/AbstractBase/login.phtml

@@ -7,9 +7,10 @@
     <input type="hidden" name="csrf" value="<?=$this->escapeHtmlAttr($account->getCsrfHash())?>" />
     <div class="form-group">
       <input class="btn btn-primary" type="submit" name="processLogin" value="<?=$this->transEsc('Login')?>">
-      <?php if ($account->supportsCreation()): ?>
+      <?php /*supportsCreation currently doesn't work in FidCore module cf. #15245
+          if ($account->supportsCreation('externalauth')): */?>
           <a data-lightbox href="<?=$this->url('feedback-form')?>?id=RegistrationRequest"><?=$this->transEsc('Create New Account')?></a>
-      <?php endif; ?>
+      <?php /*endif; */?>
       <?php if ($account->supportsRecovery()): ?>
         <a class="btn btn-link" href="<?=$this->url('myresearch-recover') ?>?auth_method=<?=$account->getAuthMethod()?>"><?=$this->transEsc('Forgot Password')?></a>
       <?php endif; ?>