code_input
Passwords are important. They help your personal accounts stay private and secure, creating a strong password is vital. The stronger your password, the more protected your computer will be from hackers and malicious software. You should maintain strong passwords for all accounts on your computer.
Here is a Flutter widget for inputting content with a fixed length, visually treating each character as a separate segment. It has some new functions and is easy to use to help you create your own password.
Usage
Below is a little example, which you may see for yourself:
CodeInput(
length: 4,
keyboardType: TextInputType.number,
builder: CodeInputBuilders.lightCircle(),
onFilled: (value) => print('Your input is $value.'),
)

For more information about the properties, have a look at the API reference.
GitHub
https://github.com/Rahiche/flutter_code_input