##### SUMMARY
This feature would implement a SetManagerNic command for the Manager category of redfish_config, to update Manager NIC configuration. 

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
redfish_config

##### ADDITIONAL INFORMATION
This command would help user to configure their Manager NIC.
if not uri:
            response = self._find_account_uri(username=user.get('account_username'),
                                              acct_id=user.get('account_id'))
            if not response['ret']:
                return response
            uri = response['uri']
            data = response['data']
        if data and data.get('UserName') == '' and not data.get('Enabled', False):
            
            return {'ret': True, 'changed': False}
        payload = {'UserName': ''}
        if data.get('Enabled', False):
            payload['Enabled'] = False
        response = self.patch_request(self.root_uri + uri, payload)
        if response['ret'] is False:
            return response
        return {'ret': True}
    def delete_user(self, user):