class User(Document):
    email = StringField(required=True)
    username = StringField(required=True)
    password = StringField(required=True)
    salt = StringField(required=True)

    @classmethod
    def create(cls, email, username, password):
        '''Call this method instead of directly instiating yourself.
           This will correctly salt the password in the database.
           Returns a User object
        '''
        salt = gen_random_string(random.randint(5, 30))
        salted = sha512(salt + password).hexdigest()
        user = User(email=email, username=username, password=salted,
                    salt=salt)
        return user

    def __eq__(self, other):
        return sha512(self.salt + other) == self.password