import re


def convert_user_name_pattern(name):
    """Convert the user's email into a valid Unix username.

    Args:
        name (str): User Email

    Returns:
        str: formatted email

    Example:
        user_name_pattern('myemail@brazildatacube.org') -> myemail_brazildatacube_org
    """
    return re.sub("[ ,.@]", "_", name)