fastify-passport: `state` for passport causes `fastify-passport` to fail

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

3.22.1

Plugin version

0.4.3

Node.js version

16.x

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

macOS Big Sure 11.3.1

Description

When I am trying to pass some encoded state to the strategy the callback URLs shows the user as unauthenticated, it’s also unclear how I could pass the encoded state from the redirect endpoint dynamically.

Steps to Reproduce

fastifyPassport.use(
    "github",
    new Github.Strategy(
      {
        clientID: "xxx",
        clientSecret: "xxx",
        callbackURL: "http://lvh.me:3000/callback",
        scope: ["user:email", "user,user:email"],
        userProfileURL: "https://api.github.com/user",
        state: Buffer.from(JSON.stringify({ returnTo: "/mypage" })).toString(
          "base64"
        ),
        passReqToCallback: true,
      },
      function (req, accessToken, refreshToken, profile, done) {
        done(null, { ...profile, accessToken, query });
      }
    )
  );

server.get(
    "/github",
    {
      preValidation: fastifyPassport.authenticate("github", {
        successRedirect: "/callback",
        authInfo: false,
        assignProperty: "user",
      }),
    },
    () => {}
  );
  
  server.get(
  "/callback",
  {
    preValidation: fastifyPassport.authenticate("github", {
      authInfo: false,
      session: false,
    }),
  },
  async (request, reply, err, user = {}, info = {}, status = {}) => {
    reply.send({ user: request.user || {} });
  }
);

Expected Behavior

Step through the prevalidation hook and return the encoded state to the endpoint.