SP_API Feed().submit_feed

[Nileshca]

I am trying to upload shipping information for an order. I am using the following fuction:
def submit_feed(api, xml_io):
try:
response = api.submit_feed(feed_type='POST_ORDER_FULFILLMENT_DATA', file=xml_io, marketplace_ids=["ATVPDKIKX0DER"], content_type='text/xml')
print(response)
err = response.errors
print(err)
feed_id = response.feed_submission_info.feed_submission_id
feed_id = response.create_feed_response.feed_submission_info.feed_submission_id # extract the feed ID from the CreateFeedResponse object
except Exception as e:
error_message = str(e)
print(f"Feed submission failed. Error message: {error_message}")
return feed_id

for the response I am getting:
(<sp_api.base.ApiResponse.ApiResponse object at 0x00000227B991ABF0>, <sp_api.base.ApiResponse.ApiResponse object at 0x00000227B99CAE30>)
Iwas expecting a feed-Id
Can anyone help tell me what i am getting wrong? thank you.