How to use the azure-mgmt-cosmosdb.azure.mgmt.cosmosdb.cosmos_db.CosmosDBConfiguration function in azure-mgmt-cosmosdb

def __init__(
            self, credentials, subscription_id, base_url=None):

        self.config = CosmosDBConfiguration(credentials, subscription_id, base_url)
        super(CosmosDB, self).__init__(self.config.credentials, self.config)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self.api_version = '2015-04-08'
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)

        self.database_accounts = DatabaseAccountsOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.operations = Operations(
            self._client, self.config, self._serialize, self._deserialize)
        self.database = DatabaseOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.collection = CollectionOperations(
            self._client, self.config, self._serialize, self._deserialize)
        self.collection_region = CollectionRegionOperations(

def __init__(
            self, credentials, subscription_id, base_url=None):

        if credentials is None:
            raise ValueError("Parameter 'credentials' must not be None.")
        if subscription_id is None:
            raise ValueError("Parameter 'subscription_id' must not be None.")
        if not base_url:
            base_url = 'https://management.azure.com'

        super(CosmosDBConfiguration, self).__init__(base_url)

        self.add_user_agent('azure-mgmt-cosmosdb/{}'.format(VERSION))
        self.add_user_agent('Azure-SDK-For-Python')

        self.credentials = credentials
        self.subscription_id = subscription_id