Hi all, I was wondering whether I could filter out events during kinesis ingestion by using also a lookup table? basically using below in the ingestion spec:

"transformSpec": {
    "filter": {
       "type": "not",
       "field": {
          "type": "extraction",
          "dimension": "user_id",
          "value": "core_free_tier",
          "extractionFn": {
            "type": "registeredLookup",
            "lookup": "customer_metadata",
            "retainMissingValue": true
          }
        }
    },
    "transforms": []
}

the lookup table looks like

Lookup : customer_metadata
------------------------------
key          | value
------------------------------
01234abcd    | developer_tier
098765ejf    | core_free_tier
djck1234k    | growth_tier
oldo4958d    | core_free_tier