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Python Flask REST API API Protection Password hashing

Flask REST API

please assist been stuck for days now Kenneth Love please assist me

models.py
import datetime

from argon2 import PasswordHasher
from itsdangerous import (TimedJSONWebSignatureSerializer as Serializer,
                          BadSignature, SignatureExpired)
from peewee import *

DATABASE = SqliteDatabase('courses.sqlite')
HASHER = PasswordHasher()


class User(Model):
    username = CharField(unique=True)
    email = CharField(unique=True)
    password = CharField()

    class Meta:
        database = DATABASE

    @classmethod
    def create_user(cls, username, email, password, **kwargs):
        email = email.lower()
        try:
            cls.select().where(
                (cls.email == email) | (cls.username**username)
            ).get()
        except cls.DoesNotExist:
            user = cls(username=username, email=email)
            user.hash_password = user.set_password(password)
            user.save()
            return user
        else:
            raise Exception("User with that email or username already exists.")


    @staticmethod 
    def set_password(password): 
        return HASHER.hash(password)

    def verify_password(self, password):
        return HASHER.verify(self.password, password)

    def generate_auth_token(self, expires=3600):
        serializer = Serializer(config.SECRET_KEY, expires_in=expires)
        return serializer.dumps({'id': self.id})

    @staticmethod
    def verify_auth_token(token):
        serializer = Serializer(config.SECRET_KEY)
        try:
            data = serializer.loads(token)
        except (SignatureExpired, BadSignature):
            return None
        else:
            user = User.get(User.id == data['id'])
            return user

class Recipe(Model):
    name = CharField()
    created_at = DateTimeField(default=datetime.datetime.now)

    class Meta:
        database = DATABASE


class Ingredient(Model):
    name = CharField()
    description = CharField()
    quantity = DecimalField()
    measurement_type = CharField()
    recipe = ForeignKeyField(Recipe)

    class Meta:
        database = DATABASE


def initialize():
    DATABASE.connect()
    DATABASE.create_tables([User, Recipe, Ingredient], safe=True)
    DATABASE.close()