pem.getAccountMembers
                                                This method is supported by Operations starting from version 6.0.
This method returns the list of account staff members ID.
The method has the following input parameters:
| 
                                                                 Name  | 
                                                            
                                                                 Type  | 
                                                            
                                                                 Short Description  | 
                                                        
|---|---|---|
| 
                                                                 
  | 
                                                            
                                                                 int  | 
                                                            
                                                                 ID of an account  | 
                                                        
Method returns an array(int) that contains the list of account staff members IDs.