You might be looking for the "ENTITY:Use" hook, which has the same name as this method.
Description
Simulates a +use
action on an entity.
Arguments
1 Entity activatorThe entity that caused this input. This will usually be the player who pressed their use key
2 Entity caller = NULLThe entity responsible for the input. This will typically be the same as activator
unless some other entity is acting as a proxy