To set up a PIN code, open the application and go to "Settings" by clicking on the three dots in the top right corner.

In the "Security" section, enter your desired PIN code and add a backup email. Backup email is needed for recovery capability, in case you forget your PIN code.

You can also configure transaction confirmation using biometrics - Face ID or Touch ID.

Setting a PIN code is mandatory for creating withdrawals. This is necessary to secure your funds from intruders in case they gain access to your Telegram account.