Update validate_user function

[Trev-Burk]

Expected Behavior

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

Actual Behavior

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

Steps to Reproduce the Problem

Specifications

• Version:
• Platform: