Allocate a JobFunction to a user
The method addUserToJobFunction allocates the entered Job Function to the entered user in JobRouter.
In case the request is successful, it returns the boolean value true.
In case the requested user or Job Function does not exist, an error message will be returned. An error message will also be returned when trying to allocate a synchronized Job Function to a user or the user is already part of this Job Function.
Method reference
Return value: bool; true, if the Job Function was successfully assigned, otherwise false
