SimpleTimeTracker/app/forms.py

from django import forms
from django.core.validators import RegexValidator
from . models import User

numeric = RegexValidator(r'^[0-9+]', 'Only numeric characters.')


class LoginForm(forms.Form):
    pin = forms.CharField(strip=True, widget=forms.PasswordInput(attrs={
        'class': 'form-control form-control-lg p-4 text-center',
        'id': 'pin',
    }), label=None, validators=[numeric])


class CreateUserForm(forms.Form):
    first_name = forms.CharField(strip=True, required=True)
    last_name = forms.CharField(strip=True, required=True)
    pin = forms.CharField(strip=True, required=True, validators=[numeric], help_text="Numeric values only")