SearchMessagesByUserQuery

Paginated query for searching messages by user.

For ChannelType.COMMUNITY channels:

• When SearchMessagesByUserQueryParams.subChannelIds is null or empty, searches all sub-channels via searchMessagesByUserForAllChannels.

• When SearchMessagesByUserQueryParams.subChannelIds has values, searches the specified sub-channels via searchMessagesByUserForChannels.

For other channel types, uses searchMessagesByUser directly.

Create via BaseChannel.createSearchMessagesByUserQuery; cannot be constructed directly.

val params = SearchMessagesByUserQueryParams(
    channelId = "channel123",
    channelType = ChannelType.GROUP,
    userId = "user123"
)
val query = BaseChannel.createSearchMessagesByUserQuery(params)

query.loadNextPage { messages, error ->
    if (error == null && messages != null) {
        // Handle search results
    }
}