Remove duplicate prerequisites

Author: pavelprystinka

articles/communication-services/quickstarts/ui-library/get-started-calling-with-chat.md

@@ -17,13 +17,6 @@ zone_pivot_groups: acs-plat-ios-android
 
 # Integrate Calling and Chat UI Libraries
 
-## Prerequisites
-
-- An Azure account with an active subscription. [Create an account for free](https://azure.microsoft.com/free/?WT.mc_id=A261C142F).
-- A deployed Communication Services resource. [Create a Communication Services resource](../create-communication-resource.md).
-- A user access token to enable the call and chat composites. [Get a user access token](../access-tokens.md).
-- Optional: Completion of the [quickstart for getting started with the UI Library composites](get-started-composites.md).
-
 ## Set up the feature
 
 ::: zone pivot="platform-android"

articles/communication-services/quickstarts/ui-library/includes/get-started-calling-with-chat/android.md

@@ -147,6 +147,7 @@ To initialize the Call composite:
     - Replace `TEAM_MEETING_LINK` with the Teams meeting link.
     - Replace `ACS_ENDPOINT` with your ACS resource's endpoint.
     - Replace `DISPLAY_NAME` with your name.
+    - Replace `USER_ID` with ACS user ID.
     - Replace `USER_ACCESS_TOKEN` with your token.
 
 ### Get a Teams meeting chat thread for a Communication Services user

articles/communication-services/quickstarts/ui-library/includes/get-started-calling-with-chat/ios.md

@@ -99,6 +99,7 @@ To initialize the composite:
     - Replace `TEAM_MEETING_LINK` with the Teams meeting link.
     - Replace `ACS_ENDPOINT` with your ACS resource's endpoint.
     - Replace `DISPLAY_NAME` with your name.
+    - Replace `USER_ID` with ACS user ID.
     - Replace `USER_ACCESS_TOKEN` with your token.
 
 ### Get a Teams meeting chat thread for a Communication Services user