Which type of authorization can only be assigned to users and not groups?

The focus of this question is on understanding the distinctions between different types of authorizations within a Privileged Access Management (PAM) context. User authorizations are specifically designed to be assigned to individual users, ensuring that those users have specific permissions that apply directly to them. This can be critical in environments where tasks need to be tightly controlled and audited on a per-user basis.

Vault authorizations, on the other hand, typically govern access to resources like secrets or sensitive data, but they aren't inherently restricted to just individual users—they can also encompass groups. This flexibility allows for a broader approach to managing access in situations where multiple users require the same level of permission.

The other options, namely safe authorizations and group authorizations, clearly indicate their applicability to either specific locations (safes) or broader group dynamics. Hence, if a type of authorization can only be ascribed to users personally, it stands distinct from any that can be shared or collectively assigned. This specific assignment to users is what makes user authorizations unique within this framework.