This is to configure the type of characters to be considered for password validation rules. Following four type of characters are considered - Alphabetical lower case, Alphabetical upper case, numerical and special characters. This object takes values as bit mask. BIT 0 - Alphabetical lower case characters. BIT 1 - Alphabetical upper case characters. BIT 2 - Numeric characters. BIT 3 - Special characters. Note: BIT 0 - Least significant bit BIT 3 - Most significant bit For example, setting the password validation as 3 (i.e., 0011), will enable validation corresponds to first (i.e., lower case) and second bit (i.e., upper case). Setting all the bits enables validation of lower case, upper case, numeric and special symbols in password. By default, all flags will be enabled.