AWS_S3_CUSTOM_DOMAIN usage

[Mirrormsk]

Hi!

I'm using the plugin, and it works great. There are some differences after migrating from django-storages. I had to add the bucket prefix to AWS_S3_ENDPOINT_URL: https://<bucket_name>.old.s3.url instead of https://old.s3.url as it was before (this may be a peculiarity of my storage).

Also, I previously used AWS_S3_CUSTOM_DOMAIN with a public domain. To make everything work again, I had to override the form:

class VideoLessonAdminForm(forms.ModelForm):
    class Meta:
        model = VideoLesson
        fields = [
            "title",
            "description",
            "file",
            "poster",
            "lesson_page",
            "is_published",
        ]
        widgets = {
            "file": S3DirectWidget(dest="videos"),
        }

    def clean_file(self):
        value = self.cleaned_data.get("file")

        custom_domain = getattr(settings, "AWS_S3_CUSTOM_DOMAIN", None)
        aws_endpoint_url = getattr(settings, "AWS_S3_ENDPOINT_URL", None)

        if value and custom_domain and aws_endpoint_url:
            value = "https://" + value.replace(aws_endpoint_url, custom_domain)

        return value
        ```
Is there any way to use the AWS_S3_CUSTOM_DOMAIN variable in the plugin?