text: from flask_wtf import FlaskForm
  from wtforms import StringField, PasswordField, SubmitField, BooleanField
  from wtforms.validators import DataRequired, Length, Email, EqualTo
  
  
  class RegistrationForm(FlaskForm):
      username = StringField('Uesrname', 
                             validators=[DataRequired(), Length(min=2, max=20)])
      email = StringField('Email', 
                             validators=[DataRequired(), Email()])
      password = PasswordField('Password', validators=[DataRequired()])
      confirm_password = PasswordField('Confirm Password', 
                                       validators=[DataRequired(), EqualTo('password')])
      submit = SubmitField('Sign Up')
  
  
  class LoginForm(FlaskForm):
      email = StringField('Email', 
                             validators=[DataRequired(), Email()])
      password = PasswordField('Password', validators=[DataRequired()])
      remember = BooleanField('Remember me')
      submit = SubmitField('Login')