+### Multi-factor authentication - :two_factor_authentication
+* `totp` - a list containing TOTP configuration
+ - `digits` - Determines the length of a one-time pass-code in characters. Defaults to 6 characters.
+ - `period` - a period for which the TOTP code will be valid in seconds. Defaults to 30 seconds.
+* `backup_codes` - a list containing backup codes configuration
+ - `number` - number of backup codes to generate.
+ - `length` - backup code length. Defaults to 16 characters.