Node.js, Passport.js, connect-flash message when login. Doesn't work with axios

package.json

{
  "dependencies": {
    "axios": "^0.19.2",
    "body-parser": "^1.9.0",
    "connect-flash": "^0.1.1",
    "cookie-parser": "^1.4.5",
    "express": "^4.17.1",
    "express-session": "^1.17.1",
    "passport": "^0.4.1",
    "passport-local": "^1.0.0"
  }
}

server.js

var express = require("express"),
  session = require("express-session"),
  cookieParser = require("cookie-parser"),
  bodyParser = require("body-parser"),
  passport = require("passport"),
  LocalStrategy = require("passport-local").Strategy,
  axios = require("axios");
flash = require("connect-flash");

var app = express();

// Test user so don't need database
var USER = {
  email: "[email protected]",
  validPassword: function (passwd) {
    return passwd === "test";
  },
};

var getUser = function (email, cb) {
  if (email !== "[email protected]") return cb(null, null);
  return cb(null, USER);
};

passport.serializeUser(function (user, cb) {
  cb(null, user.email);
});

passport.deserializeUser(function (email, cb) {
  cb(null, USER);
});

passport.use(
  new LocalStrategy(
    {
      usernameField: "email",
    },
    async (username, password, done) => {
      try {
        const user = await getUser(username, function (err, user) {
          return user ? user : null;
        });
        if (!user) {
          return done(null, false, { message: "Invalid username." });
        }
        const passwordOK = await USER.validPassword(password);
        if (!passwordOK) {
          return done(null, false, { message: "invalid password." });
        }
        console.log(`about to return done`);
        return done(null, user);
      } catch (err) {
        console.log(`error logging in: ${err}`);
        return done(null);
      }
    }
  )
);
app.use(cookieParser());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(
  session({
    secret: "secret cat",
    resave: true,
    saveUninitialized: true,
  })
);
app.use(flash());
app.use(passport.initialize());
app.use(passport.session());

app.get("/login", (req, res) => {
  const flashmsg = req.flash("error")[0];
  if (req.query.error === "false") return res.send(`Welcome `);
  return res.send("Error from Flash Message: " + flashmsg);
});

app.post(
  "/login",
  passport.authenticate("local", {
    successRedirect: "/login?error=false",
    failureRedirect: "/login?error=true",
    failureFlash: true,
  })
);
axios
  .post("http://localhost:3300/login", {
    email: "[email protected]",
    password: "pasksword", //wrong password, should give us a flash message
  })
  .then((response) => {
    // handle success

    console.log("axios--" + response.data);
  })
  .catch((error) => {
    // handle error
    console.log(error.message);
  });

app.listen(3300);