Catch exception and trigger fallback

When having connection or network failures, the fallback was not executed and the user was unable to login on the application even though the fallback option was enabled.

Author: ivanwitzke

src/Auth/DatabaseUserProvider.php

@@ -2,6 +2,7 @@
 
 namespace Adldap\Laravel\Auth;
 
+use Adldap\Auth\BindException;
 use Adldap\Laravel\Commands\Import;
 use Adldap\Laravel\Commands\SyncPassword;
 use Adldap\Laravel\Events\AuthenticatedWithCredentials;
@@ -90,7 +91,13 @@ public function updateRememberToken(Authenticatable $user, $token)
      */
     public function retrieveByCredentials(array $credentials)
     {
-        $user = Resolver::byCredentials($credentials);
+        try {
+            $user = Resolver::byCredentials($credentials);
+        } catch (BindException $e) {
+            if (!$this->isFallingBack()) {
+                throw $e;
+            }
+        }
 
         if ($user instanceof User) {
             return $this->setAndImportAuthenticatingUser($user);