Not sure what is wrong with my code here. Any help?

import datetime

from peewee import *

from argon2 import PasswordHasher

DATABASE = SqliteDatabase('recipes.db')

HASHER = PasswordHasher()

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

class Meta:
    database = DATABASE

@classmethod
def create_user(cls, username, password):
    try:
        cls.get(cls.username**username)
    except cls.DoesNotExist:
        user = cls(username=username)
        user.password = cls.hash_password(password) #Here the class instance is calling the static method we just made
        user.save()
        return user
    else:
        raise Exception("User already exists")  

@staticmethod
def hash_password(password):   #function takes in user password and hashes it
    return HASHER.hash(password)



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()