What exactly is aep.connection.auth.client.code ?

Does anyone know what `aep.connection.auth.client.code` actually refers to?

I see the Description for that row in the table on this `README` says "IMS client code", but I don't see that at https://developer.adobe.com/console for my project. I only see "Access token", "Client ID", "Client Secret", "Technical Account ID", "Technical Account Email", and "Organization ID".

I tried using the access token for `aep.connection.auth.client.code`, and the Kafka Connect connector returned:
```
java.lang.NullPointerException: null value in entry: AUTH_ENDPOINT=null
at com.google.common.collect.CollectPreconditions.checkEntryNotNull(CollectPreconditions.java:33)
at com.google.common.collect.ImmutableMapEntry.(ImmutableMapEntry.java:54)
at com.google.common.collect.ImmutableMap.entryOf(ImmutableMap.java:341)
at com.google.common.collect.ImmutableMap$Builder.put(ImmutableMap.java:450)
at com.adobe.platform.streaming.sink.AbstractAEPPublisher.getIMSTokenProvider(AbstractAEPPublisher.java:147)
at com.adobe.platform.streaming.sink.AbstractAEPPublisher.getAuthProvider(AbstractAEPPublisher.java:123)
at com.adobe.platform.streaming.sink.AbstractAEPPublisher.getHttpProducer(AbstractAEPPublisher.java:82)
at com.adobe.platform.streaming.sink.impl.AEPPublisher.(AEPPublisher.java:58)
at com.adobe.platform.streaming.sink.impl.AEPSinkTask.init(AEPSinkTask.java:34)
at com.adobe.platform.streaming.sink.AbstractSinkTask.start(AbstractSinkTask.java:88)
at org.apache.kafka.connect.runtime.WorkerSinkTask.initializeAndStart(WorkerSinkTask.java:313)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:199)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:256)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)

```

The README table is the only named documentation location; begin by comparing its `aep.connection.auth.client.code` description with the authentication path, especially `AbstractAEPPublisher.getIMSTokenProvider` and `getAuthProvider` from the stack trace. Use the reported `AUTH_ENDPOINT=null` failure to identify the expected configuration, then update the README so the parameter's meaning and required Adobe Console value are unambiguous.

Written by the indexing model from the issue text.