### Is there an existing issue for this?

- [X] I have searched the existing issues and read the documentation

### Question

After configuring it  withEnv("DYNAMODB_WRITE_ERROR_PROBABILITY", "1.0") — it is expected to throw dynamo throuput exception , but throwing 500 error - `(Service: DynamoDb, Status Code: 500, Request ID: null, Extended Request ID: null)","operationType":"PutItem","kinesisRecordMetaData":{"recordInsertionDate":"01-01-2021"}}, Response - PutObjectResponse(ETag="5435b0664a1337227d380fbd83ebcc89")

### Anything else?

_No response_
auth_header = headers.get("Authorization")
    if auth_header:
        regex = r"Credential=([^/]+)/([^/]+)/([^/]+)/"
        auth_header = re.sub(regex, r"Credential=\1/\2/%s/" % region, auth_header)
        headers["Authorization"] = auth_header
def dynamodb_get_item_raw(request):
    headers = mock_aws_request_headers()
    headers["X-Amz-Target"] = "DynamoDB_20120810.GetItem"
    new_item = make_http_request(
        url=config.service_url("dynamodb"),
        method="POST",
        data=json.dumps(request),
        headers=headers,
    )
    new_item = new_item.text
    new_item = new_item and json.loads(new_item)
    return new_item
def create_dynamodb_table(