One of the features of Telegram is the Active session section, in this section you can see all the devices that are connected to your Telegram account. In this section, it displays all the login information on all types of platforms, along with the address and IP, and the login date. The important point is that you can use this section to close all connections that are expired or suspicious. 

If you close an active device in this section, it will no longer be possible to log into your account from that location

You can use AnyControl telegram hacking software features to control your kids’ messages, calls and activities on this messenger.

Full and step-by-step explanation of canceling access of other devices to your Telegram account on Android

First, enter the Telegram menu and then touch the Setting option.

In the next step, find the privacy and security option and then touch it.

In the security section, select Active Sessions.

Now, in the Active Sessions section, you can see all the information of the devices that are connected to your account.

 To remove other devices, just touch the Terminate All Other Sessions option.

Click OK in the opened window

Full and step-by-step explanation of canceling access of other devices to your Telegram account on iOS

First, refer to Settings.

Touch the Chat Setting option.  

Touch Terminate All Other Sessions

Click OK in the opened window