#### SUMMARY
This feature would implement a UpdateUserName command for the Accounts category of redfish_command, to update user name. And also implement a UpdatePasswordPolicy command for the Accounts category of redfish_command to change password policy.

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
redfish_command

##### ADDITIONAL INFORMATION
These 2 commands would help user to update user name or update password policy

return self.aggregate(self.get_cpu_inventory)
    def get_memory_inventory(self, systems_uri):
        result = {}
        memory_list = []
        memory_results = []
        key = "Memory"
        
        properties = ['SerialNumber', 'MemoryDeviceType', 'PartNuber',
                      'MemoryLocation', 'RankCount', 'CapacityMiB', 'OperatingMemoryModes', 'Status', 'Manufacturer', 'Name']
        
        response = self.get_request(self.root_uri + systems_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        data = response['data']
        if key not in data:
            return {'ret': False, 'msg': "Key %s not found" % key}
        memory_uri = data[key]["@odata.id"]
        
        response = self.get_request(self.root_uri + memory_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        data = response['data']
        for dimm in data[u'Members']:
            memory_list.append(dimm[u'@odata.id'])