old_contents: from flask_wtf import Form
  from wtforms import TextField, PasswordField
  from wtforms.validators import DataRequired, Email, Length, EqualTo
  
  from project.models import User
  
  
  class LoginForm(Form):
      email = TextField('email', validators=[DataRequired(), Email()])
      password = PasswordField('password', validators=[DataRequired()])
  
  
  class RegisterForm(Form):
      email = TextField(
          'email',
          validators=[DataRequired(), Email(message=None), Length(min=6, max=40)])
      password = PasswordField(
          'password',
          validators=[DataRequired(), Length(min=6, max=25)]
      )
      confirm = PasswordField(
          'Repeat password',
          validators=[
              DataRequired(),
              EqualTo('password', message='Passwords must match.')
          ]
      )
  
      def validate(self):
          initial_validation = super(RegisterForm, self).validate()
          if not initial_validation:
              return False
          user = User.query.filter_by(email=self.email.data).first()
          if user:
              self.email.errors.append("Email already registered")
              return False
          return True
  
  
  class ChangePasswordForm(Form):
      password = PasswordField(
          'password',
          validators=[DataRequired(), Length(min=6, max=25)]
      )
      confirm = PasswordField(
          'Repeat password',
          validators=[
              DataRequired(),
              EqualTo('password', message='Passwords must match.')
          ]
      )
  
new_contents: from flask_wtf import Form
  from wtforms import TextField, PasswordField
  from wtforms.validators import DataRequired, Email, Length, EqualTo
  
  from project.models import User
  
  
  class LoginForm(Form):
      email = TextField('email', validators=[DataRequired(), Email()])
      password = PasswordField('password', validators=[DataRequired()])
  
  
  class RegisterForm(Form):
      email = TextField(
          'email',
          validators=[DataRequired(), Email(message=None), Length(min=6, max=40)])
      password = PasswordField(
          'password',
          validators=[DataRequired(), Length(min=6, max=25)]
      )
      confirm = PasswordField(
          'Repeat password',
          validators=[
              DataRequired(),
              EqualTo('password', message='Passwords must match.')
          ]
      )
  
      def validate(self):
          initial_validation = super(RegisterForm, self).validate()
          if not initial_validation:
              return False
          user = User.query.filter_by(email=self.email.data).first()
          if user:
              self.email.errors.append("Email already registered")
              return False
          return True
  
  
  class ResetPasswordForm(Form):
      email = TextField(
          'email', validators=[DataRequired(), Email(message=None), Length(min=6, max=40)])
  
  
  class ChangePasswordForm(Form):
      password = PasswordField(
          'password',
          validators=[DataRequired(), Length(min=6, max=25)]
      )
      confirm = PasswordField(
          'Repeat password',
          validators=[
              DataRequired(),
              EqualTo('password', message='Passwords must match.')
          ]
      )
  
subject: Create basic password reset form