How to use the s3contents.genericmanager.GenericContentsManager function in s3contents

import json
from urllib.parse import urlparse

from traitlets import Any

from s3contents.genericmanager import GenericContentsManager, from_dict
from s3contents.ipycompat import Unicode
from s3contents.s3_fs import S3FS


class S3ContentsManager(GenericContentsManager):

    access_key_id = Unicode(
        help="S3/AWS access key ID", allow_none=True, default_value=None
    ).tag(config=True, env="JPYNB_S3_ACCESS_KEY_ID")
    secret_access_key = Unicode(
        help="S3/AWS secret access key", allow_none=True, default_value=None
    ).tag(config=True, env="JPYNB_S3_SECRET_ACCESS_KEY")

    endpoint_url = Unicode("https://s3.amazonaws.com", help="S3 endpoint URL").tag(
        config=True, env="JPYNB_S3_ENDPOINT_URL"
    )
    region_name = Unicode("us-east-1", help="Region name").tag(
        config=True, env="JPYNB_S3_REGION_NAME"
    )
    bucket = Unicode("notebooks", help="Bucket name to store notebooks").tag(
        config=True, env="JPYNB_S3_BUCKET"

from s3contents.gcs_fs import GCSFS
from s3contents.genericmanager import GenericContentsManager
from s3contents.ipycompat import Unicode


class GCSContentsManager(GenericContentsManager):

    project = Unicode(help="GCP Project", allow_none=True, default_value=None).tag(
        config=True, env="JPYNB_GCS_PROJECT"
    )
    token = Unicode(
        help="Path to the GCP token", allow_none=True, default_value=None
    ).tag(config=True, env="JPYNB_GCS_TOKEN_PATH")

    region_name = Unicode("us-east-1", help="Region name").tag(
        config=True, env="JPYNB_GCS_REGION_NAME"
    )
    bucket = Unicode("notebooks", help="Bucket name to store notebooks").tag(
        config=True, env="JPYNB_GCS_BUCKET"
    )

    prefix = Unicode("", help="Prefix path inside the specified bucket").tag(

def __init__(self, *args, **kwargs):
        super(GenericContentsManager, self).__init__(*args, **kwargs)
        self._fs = None