Convert user name to a uid

    Args:
        user (str): The user to lookup

    Returns:
        str: The user id of the user

    CLI Example:

    .. code-block:: bash

        salt '*' file.user_to_uid myusername

def user_to_uid(user):
    '''
    Convert user name to a uid

    Args:
        user (str): The user to lookup

    Returns:
        str: The user id of the user

    CLI Example:

    .. code-block:: bash

        salt '*' file.user_to_uid myusername
    '''
    if user is None:
        user = salt.utils.user.get_user()

    return salt.utils.win_dacl.get_sid_string(user)