Pass Auth exceptions through on login so that custom error messages can be displayed.

module/VuFind/src/VuFind/Auth/ILS.php

@@ -113,6 +113,9 @@ class ILS extends AbstractBase
         // Connect to catalog:
         try {
             $patron = $this->getCatalog()->patronLogin($username, $password);
+        } catch (AuthException $e) {
+            // Pass Auth exceptions through
+            throw $e;
         } catch (\Exception $e) {
             throw new AuthException('authentication_error_technical');
         }

module/VuFind/src/VuFind/Auth/MultiILS.php

@@ -71,6 +71,9 @@ class MultiILS extends ILS
         // Connect to catalog:
         try {
             $patron = $this->getCatalog()->patronLogin($username, $password);
+        } catch (AuthException $e) {
+            // Pass Auth exceptions through
+            throw $e;
         } catch (\Exception $e) {
             throw new AuthException('authentication_error_technical');
         }