import os
import django

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
django.setup()

from apps.accounts.models import User
from apps.accounts.serializers import UserSerializer

user = User.objects.first()
data = {
    'first_name': user.first_name, 
    'last_name': user.last_name, 
    'email': user.email, 
    'phone': ''
}
serializer = UserSerializer(user, data=data, partial=True)
print("Is valid:", serializer.is_valid())
print("Errors:", serializer.errors)