tts_app/auth/forms.py

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import DataRequired, Length

class LoginForm(FlaskForm):
    username = StringField('Username', validators=[DataRequired(), Length(1, 64)])
    password = PasswordField('Password', validators=[DataRequired()])
    submit = SubmitField('Login')