#### 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

response = self.get_request(self.root_uri + resource_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}
        virtualmedia_uri = data[key]["@odata.id"]
        
        response = self.get_request(self.root_uri + virtualmedia_uri)
        if response['ret'] is False:
            return response
        result['ret'] = True
        data = response['data']
        for virtualmedia in data[u'Members']:
            virtualmedia_list.append(virtualmedia[u'@odata.id'])
        for n in virtualmedia_list:
            virtualmedia = {}
            uri = self.root_uri + n
            response = self.get_request(uri)
            if response['ret'] is False:
                return response
            data = response['data']
            for property in properties:
                if property in data:
                    virtualmedia[property] = data[property]
            virtualmedia_results.append(virtualmedia)
        result["entries"] = virtualmedia_results
        return result
    def get_multi_virtualmedia(self):