[Solved] How do I require at least 8 characters?

I'm making two fields, one for signup and other for login. How do I require at minimum 8 characters? How do I can detect this? Thanks in advance!

Regex.

This one is for A-Z a-z 0-9 and length of 5-20.

System|Compare two values:

len(TextBox.Text)

To prevent: is smaller (<) To allow: is greater or equal (>=)

8

Thanks, guys!