patterns/proxy/

Also known as Surrogate Intent Provide a surrogate or placeholder for another object to control access to it. Explanation Real-world example Imagine a tower where the local wizards go to study their spells. The ivory tower can only be accessed through a proxy which ensures that only the first three wizards can enter. Here the proxy represents the functionality of the tower and adds access control to it.

https://java-design-patterns.com/patterns/proxy/