search Channels
Search channels.
Parameters
String Search by channel names (case insensitive substring)
String Search by channel topic (case insensitive substring)
List
List
Boolean Search among subscribed or non subscribed channels only
Int Allow to specify the number of channels to retrieve (default value 100)
Int Allow to specify the position of first channel to retrieve (default value 0)
String Sort channels based on the given field (default value name, authorized values : name, topic, users_count, subscribers_count)
Int Specify order ascending (1) / descending (2)
RainbowListener, Unit> callback (onSuccess, onError)