There are three ways to find out if a user is online: 1. Using our SDKs. Please check guides here: iOS SDK - Advanced | Chat | iOS SDK | QuickBlox Android SDK - Advanced | Chat | Android SDK | QuickBl...
It is unsafe to store the password in an open form, so it is OK that you cannot retrieve it. For security reasons only a user can know their password. You can update a user password in the QuickBlox A...
Yes, it is possible to allow write access to multiple users. QuickBlox released iOS SDK 1.7 with Permissions API, please check more details here: Custom Objects | iOS SDK | QuickBlox The same you can ...