What functions can be performed using getUserByIdAsync and getGroupByIdAsync?

The function getUserByIdAsync is specifically designed to retrieve user information based on the provided user ID, while getGroupByIdAsync serves the same purpose for group information. These functions enable ad hoc retrieval of Users or Groups, allowing developers to fetch specific details about users or groups whenever needed. This capability is critical for applications that require real-time access to user and group data without the need for pre-defined queries or setups.

The other options are not applicable in this context. Retrieving documents by ID would involve different methods and is focused on document storage rather than user or group data. Creating or deleting users or groups involves functions that modify data rather than retrieving it, which is the primary role of getUserByIdAsync and getGroupByIdAsync. Thus, the correct answer highlights the retrieval functions, emphasizing their role in obtaining user and group data as required.