Auth error after having the user logged

supabase: Client = create_client(supabase_url, supabase_key)

@app.route('/')
def home():
    if 'user' in session:
        return redirect('/dashboard')
    return '''
        <a href="/login/github">Login with GitHub</a><br>
        <a href="/login/google">Login with Google</a><br>
        <a href="/login/microsoft">Login with Microsoft</a>
    ''' 
 
@app.route('/login/<provider>')
def login(provider):
    redirect_uri = 'https://mvtnwpifahffpceqsemj.supabase.co/auth/v1/callback'
    auth_url = f"{supabase_url}/auth/v1/authorize?provider={provider}&redirect_to={redirect_uri}"
    logging.info(f"Redirect URL: {auth_url}")
    return redirect(auth_url)
 
@app.route('/callback')
def callback():
    code = request.args.get('code')
    if code:
        try:
            auth_response = supabase.auth.exchange_code_for_session(code)
            user = supabase.auth.user()
            session['user'] = user
            logging.info(f"User info: {user}") 

            user_data = {
                'email': user['email'],
                'name': user['user_metadata']['full_name'],
            }
            return redirect('/dashboard')
        except Exception as e:
            logging.error(f"Error during authentication: {str(e)}")
            return "Authentication failed", 400
    return "Authentication failed", 400
 
@app.route('/dashboard')
def dashboard():
    if 'user' in session:
        return f'Sei loggato, {session["user"]["user_metadata"]["full_name"]}! <a href="/logout">Logout</a>'
    return redirect('/')
 
if __name__ == '__main__':
    logging.basicConfig(level=logging.INFO) 
    app.run(debug=True, port=5000)