[Security] alway use getUserIdentifier in InMemoryTokenProvider

Author: alamirault

Authentication/RememberMe/InMemoryTokenProvider.php

@@ -42,7 +42,7 @@ public function updateToken(string $series, #[\SensitiveParameter] string $token
 
         $token = new PersistentToken(
             $this->tokens[$series]->getClass(),
-            method_exists($this->tokens[$series], 'getUserIdentifier') ? $this->tokens[$series]->getUserIdentifier() : $this->tokens[$series]->getUsername(),
+            $this->tokens[$series]->getUserIdentifier(),
             $series,
             $tokenValue,
             $lastUsed