python pd.timestamp add dias

def add_days_to_date(date, days):
    '''Add days to a date and return the date.
    
    Args: 
        date (string): Date string in YYYY-MM-DD format. 
        days (int): Number of days to add to date
    
    Returns: 
        date (date): Date in YYYY-MM-DD with X days added. 
    '''
    
    add_date = pd.to_datetime(date) + timedelta(days=days)
    add_date = added_date.strftime("%Y-%m-%d")

    return added_date

date_addition = add_days_to_date('2021-01-01', 13)

print(date_addition)
$ '2021-01-14'
Condemned Crayfish