def register():
form = RegisterForm(request.form)
if request.method == 'POST' and form.validate():
data = (request.form).to_dict()
data.pop('csrf_token', None)
try:
user = User(**data)
user.save()
except NotUniqueError:
flash('This username is existed!', 'error')
return render_template('sites/home/register.html', form=form)
