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# Type of request: This is a ...

[ ] bug report
[X ] feature request

# Detailed description

I'm using localstack to create a dynamoDb table locally with a dynamodb stream and a flink application consuming data from the stream
The shardId created in localstack follows this format

shardId-000000000000-798cedd84a2953c5af70a131f8701f35

Flink expects this format
shardId-00000001592367572726-07776efd

The difference is just after the prefix shardId.
Normally the real shardId created by amazon use is composed by shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

The current shardId format is not valid for flink applications and it's not following the real pattern used by amazon

## Expected behavior

ShardId must follow the pattern
shardId prefix, 20-digit timestamp and 0-36 or more characters separated by '-'

## Actual behavior

The shardId follows the pattern
shardId prefix, 12 0s and 33 characters separated by '-'

# Steps to reproduce

Create a dynamodb table

## Command used to start LocalStack

I'm using docker and docker compose to run localstack


## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

aws --endpoint-url=http://localhost:4566 dynamodb create-table \
    --table-name temp4 \
    --attribute-definitions AttributeName=partition_key,AttributeType=S AttributeName=sort_key,AttributeType=S \
    --key-schema AttributeName=partition_key,KeyType=HASH AttributeName=sort_key,KeyType=RANGE \
    --provisioned-throughput ReadCapacityUnits=100,WriteCapacityUnits=100 \
    --stream-specification StreamEnabled=true,StreamViewType=NEW_AND_OLD_IMAGES


""" Merge all dicts in `*dicts` into a single dict, and return the result. If any of the entries
        in `*dicts` is None, and `default` is specified as keyword argument, then return `default`. """
    result = {}
    for d in dicts:
        if d is None and 'default' in kwargs:
            return kwargs['default']
        if d:
            result.update(d)
    return result
def recurse_object(obj, func, path=''):
    """ Recursively apply `func` to `obj` (may be a list, dict, or other object). """
    obj = func(obj, path=path)
    if isinstance(obj, list):
        for i in range(len(obj)):
            tmp_path = '%s[%s]' % (path or '.', i)
            obj[i] = recurse_object(obj[i], func, tmp_path)
    elif isinstance(obj, dict):
        for k, v in obj.items():
            tmp_path = '%s%s' % ((path + '.') if path else '', k)
            obj[k] = recurse_object(v, func, tmp_path)
    return obj
def base64_to_hex(b64_string):