Follow these steps to set up stronger password validation for your project:

1. Let's customize the settings for the validators that are included with Django by adding some options:

# myproject/settings/_base.py
AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation."
        "UserAttributeSimilarityValidator",
        "OPTIONS": {"max_similarity": 0.5},
    },
    {
        "NAME": "django.contrib.auth.password_validation." 
        "MinimumLengthValidator",
        "OPTIONS": {"min_length": 12},
    },
    {"NAME": "django.contrib.auth.password_validation." 
    "CommonPasswordValidator"},
    {"NAME": "django.contrib.auth.password_validation." 
    "NumericPasswordValidator"},
]

2. Add the MaximumLengthValidator class to the password_validation.py file in the new auth_extra app, as follows:

# myproject/apps/auth_extra/password_validation.py
from django.core.exceptions import ValidationError
from django.utils.translation import gettext as _


class MaximumLengthValidator:
    def __init__(self, max_length=24):
        self.max_length = max_length

    def validate(self, password, user=None):
        if len(password) > self.max_length:
            raise ValidationError(
                self.get_help_text(pronoun="this"),
                code="password_too_long",
                params={'max_length': self.max_length},
            )

    def get_help_text(self, pronoun="your"):
        return _(f"{pronoun.capitalize()} password must contain "
                 f"no more than {self.max_length} characters")

3. In the same file, create the SpecialCharacterInclusionValidator class:

class SpecialCharacterInclusionValidator:
    DEFAULT_SPECIAL_CHARACTERS = ('$', '%', ':', '#', '!')

    def __init__(self, special_chars=DEFAULT_SPECIAL_CHARACTERS):
        self.special_chars = special_chars

    def validate(self, password, user=None):
        has_specials_chars = False
        for char in self.special_chars:
            if char in password:
                has_specials_chars = True
                break
        if not has_specials_chars:
            raise ValidationError(
                self.get_help_text(pronoun="this"),
                code="password_missing_special_chars"
            )

    def get_help_text(self, pronoun="your"):
        return _(f"{pronoun.capitalize()} password must contain at"
                 " least one of the following special characters: "
                 f"{', '.join(self.special_chars)}")

4. Then, add the new validators to the settings:

# myproject/settings/_base.py
from myproject.apps.auth_extra.password_validation import (
    SpecialCharacterInclusionValidator,
)

AUTH_PASSWORD_VALIDATORS = [
    {
        "NAME": "django.contrib.auth.password_validation."
        "UserAttributeSimilarityValidator",
        "OPTIONS": {"max_similarity": 0.5},
    },
    {
        "NAME": "django.contrib.auth.password_validation." 
        "MinimumLengthValidator",
        "OPTIONS": {"min_length": 12},
    },
    {"NAME": "django.contrib.auth.password_validation." 
    "CommonPasswordValidator"},
    {"NAME": "django.contrib.auth.password_validation." 
    "NumericPasswordValidator"},
    {
        "NAME": "myproject.apps.auth_extra.password_validation."
        "MaximumLengthValidator",
        "OPTIONS": {"max_length": 32},
    },
    {
        "NAME": "myproject.apps.auth_extra.password_validation."
        "SpecialCharacterInclusionValidator",
        "OPTIONS": {
            "special_chars": ("{", "}", "^", "&")
            + SpecialCharacterInclusionValidator
              .DEFAULT_SPECIAL_CHARACTERS
        },
    },
]