How to style Fluent Auth Security plugin using a code snippet

It is kinda tricky styling Fluent Auth login and register screens as just using CSS does not work. With help from support I have received the needed code to get CSS styling to work. The CSS needs to be added into a PHP code snippet. Which I made with Fluent Snippets. Here is the tutorial.

https://easywebdesigntutorials.com/how-to-style-fluent-auth-security-plugin/