accounts/serializers.py

from rest_framework import serializers
from django.contrib.auth.models import User

class UserSerializer(serializers.ModelSerializer):
    password = serializers.CharField(write_only=True)

    def create(self, validated_data):
        # Create the user instance
        user = User.objects.create_user(
            username=validated_data['username'],
            email=validated_data.get('email', ''),  # Default to empty string if email is not provided
            password=validated_data['password'],
            first_name=validated_data.get('first_name', ''),  # Default to empty string if first_name is not provided
            last_name=validated_data.get('last_name', '')  # Default to empty string if last_name is not provided
        )
        return user

    class Meta:
        model = User
        fields = ('id', 'username', 'password', 'first_name', 'last_name', 'email')