#### 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

if user.get('account_id'):
            
            response = self._find_account_uri(acct_id=user.get('account_id'))
        else:
            
            response = self._find_empty_account_slot()
        if not response['ret']:
            return response
        uri = response['uri']
        payload = {}
        if user.get('account_username'):
            payload['UserName'] = user.get('account_username')
        if user.get('account_password'):
            payload['Password'] = user.get('account_password')
        if user.get('account_roleid'):
            payload['RoleId'] = user.get('account_roleid')
        response = self.patch_request(self.root_uri + uri, payload)
        if response['ret'] is False:
            return response
        return {'ret': True}
    def add_user(self, user):