@app.route('/')
def home():
if not session.get('logged_in'):
    return render_template('homepage.html')

else:
    return render_template('quiz.html')

@app.route('/login', methods=['POST'])
def do_admin_login():
Session = sessionmaker(bind = engine)
s = Session()
global USERN
global PASSWD
POST_USERNAME = str(request.form['username']).lower()
USERN = POST_USERNAME
POST_PASSWORD = str(request.form['password'])
PASSWD = POST_PASSWORD
query = s.query(User).filter(User.username.in_([POST_USERNAME]), User.password.in_([POST_PASSWORD]))
result = query.first()
if result:
    session['logged_in'] = True
else:
    return 'wrong credentials'

return home()