Discord Authorization in react app not working with flask backend

[ItsAditya-xyz]

So I am trying to set up a flask backend through which i want to do discord authorization in my react app.
my flask backed looks like this:

@application.route("/login/")
def login():
    discordSession = discord.create_session(scope=["identify"])
    return discordSession


# function to redirect to discord oauth page.
@application.route("/callback")
def callback():
    try:
        data = discord.callback()
      
        redirect_to = data.get("redirect", REDIRECT_URL)
        # user = discord.fetch_user()
        print(redirect_to)
        return redirect_to
    except AccessDenied:
        return redirect(url_for("index"))


@application.route("/discordInfo")
def discordInfo():
    if not discord.authorized:
        # return render_template('loginPage.html')  # rendering index.html file
        return jsonify({"isAuthorized": False})
    user = discord.fetch_user()
    av = user.avatar_url if user.avatar_url else user.default_avatar_url
    userID = str(user.id)
    encryptedID = encrypt_message(userID).decode()
    data = {
        "isAuthorized": True,
        "username": user.name + "#" + user.discriminator,
        "stringID": encryptedID,
        "avatarUrl": av
    }
    return jsonify(data)

and the frontend code for login button is this:

<button
 onClick={async () => {
window.location.replace("http://127.0.0.1:5000/login/");
  }>
          discord login
</button>

when i click the discord login button, the login session starts.

When i click authorize, I am redirected to the redirect URI I have set but that URL also has some extra queries like this
http://localhost:3000/?code=KqntCqGvR1kWRckoeNZiNoUePQqpvp&state=eyJ0eXipOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJfX3N0YXRlX3NlY3JldF8iOiJodk1xcjuwc1dDVlZKMGIzUWdXNkExYTRUZ1I1NWgifQ.As-hU5qrnGZ-q4ghRi2JonTcuuJmg1uMIBcDYgI-zD8

After login, i want to hit /discordInfo to get user information but it always returns {"isAuthorized": False}

Can anyone help me figuring out what I am doing wrong?