update readme

Author: Chester Curme

README.md

@@ -22,7 +22,7 @@ or build and run using the [Dockerfile](Dockerfile).
 Ghost has four endpoints:
 * `/llm_reply`: configuring a Twilio SMS webhook to this endpoint will produce replies for inbound messages from known contacts (those in [contacts.json](ghost/settings/contacts.json)).
 * `/llm_send`: this endpoint will send an unsolicited message to a known contact following a given input prompt (requires authentication).
-* `/llm_memory`: this endpoint will fetch conversation histories with all contacts.
+* `/llm_memory`: this endpoint will fetch conversation histories with all contacts (requires authentication).
 * `/login`: this endpoint can produce a token for use with `/llm_send` and `/llm_memory`.
 
 ## Testing