Get session from cookie header only

[Tsourdox]

Is it possible to access the session from only the cookie header?
I've initiated a socket connection where I have access to authjs.csrf-token and authjs.session-token in the handshake.

  io.use(async (socket, next) => {
      const session = await auth(socket.handshake.headers.cookie);
      socket.session = session;
      next();
  });
}