✨ [feat] add 'password' demo

[Ya2gLu]

General

✏️ Mark the necessary items without changing the structure of the PR template.

• [ ] Pull request template structure not broken

Type

ℹ️ What types of changes does your code introduce?

👉 Put an x in the boxes that apply

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist

ℹ️ Check all checkboxes - this will indicate that you have done everything in accordance with the rules in CONTRIBUTING.

👉 Put an x in the boxes that apply.

• [ ] My code follows the style guidelines of this project
• [ ] Is the code format correct
• [ ] Is the git submission information standard?
• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules

[DesignHhuang]

close #198