[Django]-DRF Serializer Nested Field for User Creation

Try:

class User(models.Model):
    username = models.CharField()
    password = models.CharField()
    email = models.CharField()

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User

class ProfileSerializer(serializers.ModelSerializer):
    user = UserSerializer(many=True)
    class Meta:
        model = Profile
        fields = ('user', 'profile_type',)

    def create(self, validated_data):
        user_data = validated_data.pop('user')
        user = User.objects.create(**user_data)
        profile = Profile.objects.create(user=user, **validated_data)
        return profile

and check out
this for Writable nested serializers.

For dealing a nested object:
checkout this this