Using next-auth session token in node and express

[aziz-codes]

I have my frontend running on next js 14 and i am using next-auth for user authentication on FE, since my backend server is in a separate folder that uses express and node js, so while requesting from client to server Ia m also sending the next auth session to the backend,
now I am receiving the token and extracting 'next-auth.session-token' from it, and then while verifying it using jwt in node I am getting error that 'jwt is malformed'

is there any way to fix it?

app.post("/test", async (req, res) => {
  try {
    console.log("cookies are ", JSON.stringify(req.cookies));
    const sessionToken = req.cookies["next-auth.session-token"];

    if (!sessionToken) {
      return res.status(401).json({ message: "No session token found" });
    }

    const decoded = jwt.verify(sessionToken, process.env.NEXTAUTH_SECRET);
    res.json({ user: decoded });
  } catch (err) {
    console.error("Error decoding token:", err);
    res.status(500).json({ message: "Failed to decode token" });
  }
}); 

thanks.