added support for saml login (#1408)

src/Repository/UserRepository.php

@@ -52,21 +52,16 @@ class UserRepository extends EntityRepository implements UserLoaderInterface
      */
     public function getUserById($id): ?User
     {
-        try {
-            return $this->createQueryBuilder('u')
-                ->select('u', 'p', 't', 'tu', 'tl')
-                ->leftJoin('u.preferences', 'p')
-                ->leftJoin('u.teams', 't')
-                ->leftJoin('t.users', 'tu')
-                ->leftJoin('t.teamlead', 'tl')
-                ->where('u.id = :id')
-                ->setParameter('id', $id)
-                ->getQuery()
-                ->getSingleResult();
-        } catch (\Exception $ex) {
-        }
-
-        return null;
+        return $this->createQueryBuilder('u')
+            ->select('u', 'p', 't', 'tu', 'tl')
+            ->leftJoin('u.preferences', 'p')
+            ->leftJoin('u.teams', 't')
+            ->leftJoin('t.users', 'tu')
+            ->leftJoin('t.teamlead', 'tl')
+            ->where('u.id = :id')
+            ->setParameter('id', $id)
+            ->getQuery()
+            ->getOneOrNullResult();
     }
 
     /**
@@ -122,7 +117,7 @@ class UserRepository extends EntityRepository implements UserLoaderInterface
 
     /**
      * @param string $username
-     * @return mixed|null|\Symfony\Component\Security\Core\User\UserInterface
+     * @return null|User
      * @throws \Doctrine\ORM\NoResultException
      * @throws \Doctrine\ORM\NonUniqueResultException
      */
@@ -138,7 +133,7 @@ class UserRepository extends EntityRepository implements UserLoaderInterface
             ->orWhere('u.email = :username')
             ->setParameter('username', $username)
             ->getQuery()
-            ->getSingleResult();
+            ->getOneOrNullResult();
     }
 
     public function getQueryBuilderForFormType(UserFormTypeQuery $query): QueryBuilder