//Removes an (single?) employee of the given lastName or SIN number
void removeEmployee(struct Node** head, char firstName [256], int sinNum){
    if (*head == NULL)
        return;
    struct Node* current = *head;
    struct Node* prev = current;
    struct Node* temp = NULL;
    do{
        //if one of the other is true don't need to check which one the user wants to use because they will not equal anywyas
        if (current->employee->sinNumber == sinNum || strcmp(current->employee->firstName, firstName) == 0){
            temp = current; //holds the node to be freed
            prev->next = current->next; //deletes the employee
            free(temp->employee);
            free(temp);
        }
        prev = current;
        current = current->next;
    }while(current->next!=NULL);
}