coi/app/sysadmin/filters.py

import django_filters
from django.contrib.auth.models import User

class UserFilter(django_filters.FilterSet):
    username = django_filters.CharFilter(field_name='username', lookup_expr='icontains')
    first_name = django_filters.CharFilter(field_name='first_name', lookup_expr='icontains')
    last_name = django_filters.CharFilter(field_name='last_name', lookup_expr='icontains')

    class Meta:
        model = User
        fields = ['username', 'first_name', 'last_name']  # Add fields you want to filter