forms.py

from wtforms import SubmitField, StringField, PasswordField, HiddenField, validators
from flask_wtf import FlaskForm


class LogoutForm(FlaskForm):
    logout = SubmitField("logout")


class LoginForm(FlaskForm):
    username = StringField("username", validators=[validators.input_required()])
    password = PasswordField("password", validators=[validators.input_required()])
    next_url = HiddenField("next_url")
    submit = SubmitField("Sign in")