if os.path.isfile("file.gz"):
    with gzip.GzipFile("file.gz", 'r') as fin:
        for line in fin:
            if get_new_user is True:
                if datetime.strptime(json.loads(line).get('UpdatedAt'), '%Y-%m-%dT%H:%M:%S.%fZ').date() == (datetime.today()-timedelta(1)).date():
                    users.append(json.loads(line))
            else:
                users.append(json.loads(line))
    os.remove("file.gz")
    return users

threshold = (datetime.today()-timedelta(1)).date()
for line in fin:
    user = json.loads(line)
    if get_new_user is True:
        if datetime.strptime(user.get('UpdatedAt'), '%Y-%m-%dT%H:%M:%S.%fZ').date() == threshold:
            users.append(user)
    else:
        users.append(user)

if get_new_user is True:
    threshold = (datetime.today()-timedelta(1)).date()
    for line in fin:
        user = json.loads(line)
        if datetime.strptime(user.get('UpdatedAt'), '%Y-%m-%dT%H:%M:%S.%fZ').date() == threshold:
            users.append(user)
else:
    for line in fin:
        users.append(json.loads(line))

if get_new_user is True:
    threshold = (datetime.today()-timedelta(1)).date()
    users = [ user for user in (json.loads(line) for line in fin)
              if datetime.strptime(user.get('UpdatedAt'),
                                   '%Y-%m-%dT%H:%M:%S.%fZ'
                                  ).date() == threshold ]
else:
    users = [ json.loads(line) for line in fin ]

threshold = (datetime.today()-timedelta(1)).date()
users = [ user for user in (json.loads(line) for line in fin)
          if get_new_user is not True or
             datetime.strptime(user.get('UpdatedAt'),
                               '%Y-%m-%dT%H:%M:%S.%fZ'
                              ).date() == threshold ]