def register(): form = RegistrationForm() if form.validate_on_submit(): if User.get_by(email=form.email.data): flash(message='User already existing.', category='error') return redirect(url_for('register')) user = User(email=form.email.data, password=form.password.data) user.save() flash('User is registered!') return redirect(url_for('login')) return render_template('register.html', form=form)