#### 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

equiv_types = {
            'On': 'ForceOn',
            'ForceOn': 'On',
            'ForceOff': 'GracefulShutdown',
            'GracefulShutdown': 'ForceOff',
            'GracefulRestart': 'ForceRestart',
            'ForceRestart': 'GracefulRestart'
        }
        if reset_type in allowable_values:
            return reset_type
        if reset_type not in equiv_types:
            return reset_type
        mapped_type = equiv_types[reset_type]
        if mapped_type in allowable_values:
            return mapped_type
        return reset_type
    def manage_system_power(self, command):