text: from flask_wtf import FlaskForm
  from wtforms import StringField, PasswordField, SubmitField, BooleanField
  from wtforms.validators import DataRequired, Length, Email, EqualTo, ValidationError
  from flaskmov.models import User
  
  
  class RegistrationForm(FlaskForm):
      username = StringField('Username',
                             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')
  
      def validate_username(self, username):
          user = User.query.filter_by(username=username.data).first()
          if user:
              raise ValidationError('That username is taken. Please choose a different one.')
  
      def validate_email(self, email):
          user = User.query.filter_by(email=email.data).first()
          if user:
              raise ValidationError('That email is taken. Please choose a different one.')
  
  
  class LoginForm(FlaskForm):
      email = StringField('Email',
                          validators=[DataRequired(), Email()])
      password = PasswordField('Password', validators=[DataRequired()])
      remember = BooleanField('Remember Me')
      submit = SubmitField('Login')
  