Pynamodb Transaction not using local endpoint - python-3.x

Question

Regardless of whatever I tried, pynamodb is not connecting to my local dynamodb.
Below is my model,
class OrderMarker(Model):
class Meta:
table_name = 'ddb_mrker_table'
connection = TableConnection(table_name='ddb_mrker_table', host='http://localhost:8000')
OrderUniqueueId = UnicodeAttribute(hash_key=True)
Below is the exception,
Traceback (most recent call last):
File "C:\backend\orders\snapshot\app.py", line 451, in <module>
main()
File "C:\backend\orders\snapshot\app.py", line 445, in main
OrderMarker.create_table(wait=True)
File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\site-packages\pynamodb\models.py", line 798, in create_table
if not cls.exists():
File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\site-packages\pynamodb\models.py", line 762, in exists
cls._get_connection().describe_table()
File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\site-packages\pynamodb\connection\table.py", line 294, in describe_table
return self.connection.describe_table(self.table_name)
File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\site-packages\pynamodb\connection\base.py", line 787, in describe_table
raise TableError("Unable to describe table: {}".format(e), e)
pynamodb.exceptions.TableError: Unable to describe table: Could not connect to the endpoint URL: "https://dynamodb.us-east-1.amazonaws.com/"
As you can see , pynamodb is trying to access https://dynamodb.us-east-1.amazonaws.com/ eventhough I have specified the local endpoint url. This is the case always, even when I try transactions too.
Local ddb server is run as shown below,
java -Djava.library.path=./DynamoDBLocal_lib -jar DynamoDBLocal.jar -inMemory -delayTransientStatuses
A quick check using aws dynamodb list-tables --endpoint-url http://localhost:8000 shows local server is running fine!
Any idea?