UserModule

// Subscribe User online status Event
val params = SubscribeEventParams(SubscribeType.ONLINE_STATUS, listOf("userId1", "userId2")).apply {
    expiry = 7 * 24 * 60 * 60 // 7days validity period
}
NCEngine.user.subscribeEvent(params) { failedUserIds, error ->
    if (error == null) {
        // Subscribed successfully
    } else {
        // Subscription failed, failedUserIds Contains failed usersIDList
    }
}

// Update user profile
val profileParams = UpdateUserProfileParams().apply {
    name = "New Nickname"
    gender = Gender.MALE
}
NCEngine.user.updateMyUserProfile(profileParams) { errorKeys, error ->
    if (error == null) {
        // Updated successfully
    } else {
        // Update failed, errorKeys Contains failed fields Key List
    }
}

// Add friend
val addParams = AddFriendParams("userId").apply {
    extra = "Hello, please add me friend"
}
NCEngine.user.addFriend(addParams) { resultCode, error ->
    // ...
}

// Query friend List
NCEngine.user.getFriends(FriendDirection.BOTH) { friends, error ->
    if (error == null && friends != null) {
        friends.forEach { friend ->
            println("${friend.userId}: ${friend.name}")
        }
    }
}