I need user case descriptions for a sample project

The project is to write user case descriptions.

Use Cases description:
User account creation – Registration
Password validation (8 characters)
Password Validation Lower case, upper case, special characters
Password Validation. Wrong password used more than 3 times – Account blocked
Use Cases Testing First set of requirements:
User account creation – Registration

Password validation (8 characters)
Password validation lower case, upper case, special characters