Add note to track method for CleverTap

Author: tobiordobi

src/connections/destinations/catalog/clevertap/index.md

@@ -30,6 +30,9 @@ All other traits will be sent to CleverTap as custom attributes. Please also not
 
 When you `track` an event, we will send that event to CleverTap as a custom event.  Note that CleverTap does not support arrays or nested objects for custom track event properties.
 
+> note ""
+> **NOTE:** For your `track` events to appear on CleverTap, an accompanying trait such as `userId` or `email` from `identify` is required in order for CleverTap to record and associate the `track` event.
+
 Please also note that the default logic for our cloud mode connection to CleverTap will lower case and snake_case any event properties passed from Segment's servers to CleverTap. Our device mode connection will not lower case or snake_case any event properties passed directly to CleverTap from the client.
 
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