Timeseries collection using pymongo doesnt work properly

Hi to all,
iam using pymongo and i need to create timeseries collection, the code is

 client = MongoClient()
        db = client[CoinsTimeSeries.get_db().name]
        print(db.list_collection_names(),)
        if 'coins_timeseries' not in db.list_collection_names():
            meta = {
                'timeseries': {
                  'timeField': 'timestamp',
                  'metaField': 'symbol',  
                  'granularity': 'seconds'
                },
                "storageEngine" : {
                    "wiredTiger" : {
                            "configString" : "block_compressor=zstd"
                    }
                },
                'indexes': [
                  'symbol',
                  ('timestamp', 'symbol')
                ]
                }

            print("Creating new timeseries collection...")
            db.command('create', 'coins_timeseries', timeseries={ 'timeseries': {
                  'timeField': 'timestamp',
                  'metaField': 'symbol',  
                  'granularity': 'seconds'
                },
                'indexes': [
                  'symbol',
                  ('timestamp', 'symbol')
                ] },)
        else:
            print("Exsits...")

when i use this
print(db.list_collection_names(),)

the result is
['system.views', 'coins_timeseries',]

and it does not show any collection with this name in mongo compos or any other interfaces

please tell me
where is the problem

thank you in advanced

2 possible reasons.

You are using the wrong database.

or

You are connecting to the wrong server.