How to check player class from an artifact?

Hello, im trying to make an artifact that can only be used with certain classes, i know this sounds silly because i could make that artifact spawn from an ability but this is justified, when a player picks it up from the ground, i want to let him use it only if he is weapons master for example.

How can i achieve this? again, i want to check this from an artifact not from a rpgability.

something between the lines:

If (Instigator.Data.Abilities == class'ClassWeaponsMaster')

Thanks in advance!