identify user with email to during facebook connect

src/Muzich/CoreBundle/Security/User/Provider/FacebookProvider.php

     return $this->userManager->findUserBy(array('facebook_id' => $fbId));
   }
 
+  public function findUserByEmail($email)
+  {
+    return $this->userManager->findUserBy(array('email' => $this->userManager->canonicalizeEmailLocal($email)));
+  }
+
   public function loadUserByUsername($username)
   {
     $user = $this->findUserByFbId($username);
       throw new UsernameNotFoundException('The user is not authenticated on facebook');
       $fbdata = null;
     }
-
+    
+    $user = $this->findUserByEmail($fbdata['email']);
+    
     if (!empty($fbdata)) {
       if (empty($user)) {
         $user = $this->userManager->getNewReadyUser();
     if (!$this->supportsClass(get_class($user)) || !$user->getFacebookId()) {
       throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
     }
-
+    
     return $this->loadUserByUsername($user->getFacebookId());
   }
 }

src/Muzich/UserBundle/Entity/UserManager.php

     
     return $result;
   }
+  
+  public function canonicalizeEmailLocal($email)
+  {
+    return $this->emailCanonicalizer->canonicalize($email);
+  }
 
 }