I want to use django-bootstrap-datepicker-plus, but an error has occurred and I cannot implement it.

AttributeError: module 'bootstrap_datepicker_plus' has no attribute 'DatePickerInput'

 from django import forms
from django.contrib.auth.models import User
from.models import Account
import bootstrap_datepicker_plus as datetimepicker
# Form Class Creation
class AccountForm (forms.ModelForm):
    # password entry:hiding
    password=forms.CharField (widget=forms.PasswordInput(), label="password")

    class Meta():
        # user authentication
        model=User
        # field specification
        fields=('username', 'email', 'password')
        # field naming
        labels={'username':"User ID", 'email':"mail"}

classAddAccountForm(forms.ModelForm):
    class Meta():
        # Specify model class
        model=Account
        fields=('last_name', 'first_name', 'year')
        labels = {'last_name': "last name", 'first_name': "name", 'year': 'birthday'}

        widgets = {
            'year': datetimepicker.DatePickerInput(
                format = '%Y-%m-%d',
                options = {
                    locale: 'ja',
                    dayViewHeaderFormat: 'YYYYY Year MMMM',
                }
            ),
        }

INSTALLED_APPS=[
    'django_bootstrap5',
    'bootstrap_datepicker_plus',
]