fix(react): avoid undefined 'id' property error (#151)

Author: mkcode

src/react/index.tsx

@@ -92,7 +92,7 @@ function useUseAuthFromBetterAuth(authClient: AuthClient) {
       function useAuthFromBetterAuth() {
         const { data: session, isPending: isSessionPending } =
           authClient.useSession();
-        const sessionId = session?.session.id;
+        const sessionId = session?.session?.id;
         const fetchAccessToken = useCallback(
           async () => {
             try {