chore: Switch to new API to set volatile user to prevent persisting i…

…t in any case

Signed-off-by: Julius Härtl <[email protected]>

lib/Service/UserScopeService.php

@@ -50,7 +50,13 @@ public function setUserScope(string $uid = null): void {
 		if ($user === null) {
 			throw new InvalidArgumentException('No user found for the uid ' . $uid);
 		}
-		$this->userSession->setUser($user);
+
+		/** @psalm-suppress RedundantCondition */
+		if (method_exists($this->userSession, 'setVolatileActiveUser')) {
+			$this->userSession->setVolatileActiveUser($user);
+		} else {
+			$this->userSession->setUser($user);
+		}
 	}
 
 	/**