"Credential Utilities: Get Credential" throws 403 error

[AugustZellmer]

Steps to reproduce:

1. UserA creates a Locker called "TheLocker".
   1.a. UserA makes UserB an owner of TheLocker.
2. UserA creates a credential in TheLocker called "TheCredential".
   2.a. It has an attribute called "username".
3. In a bot, add the "Credential Utilities: Get Credential" action.
   3.a. Set "Credential name" to "TheCredential".
   3.b. Set "Attribute name" to "username".
   3.c. Set "Fetch using" to "Current User".
   3.d. Set "Assign to credential" to existing credential variable.
4. Run the bot in unattended mode. Make UserB the bot runner.

Expected result: "Credential Utilities: Get Credential" retrieves TheCredential, because UserB is an owner of TheLocker.

Actual result: It throws an exception Error code: 403 Error details: {"code":"access.is.denied","details":null,"message":"Access is denied"}