Validations.py improvement and fix

[Agista Rakhasanca]

Expected Behavior

• Prints boolean result of validate_user function

Actual Behavior

• No text output

Steps to Reproduce the Problem

1. print(validate_user("blue.kale", 3)) # True
2. print(validate_user(".blue.kale", 3)) # False
3. print(validate_user("red_quinoa", 4)) # True
4. print(validate_user("_red_quinoa", 4)) # False

Specifications

• Version:
• Platform: Windows 10