def before_execution(self, context):
# register usable backends
sacker_ledger.register_ledger('s3', S3Ledger)
sacker_ledger.register_ledger('dynamo', DynamoLedger)
sacker_store.register_store('s3', S3Store)
# register schema
AuroraConfigLoader.register_schema(sacker_schema)
# register binding helper
BindingHelper.register(SackerBindingHelper())