Master account sequence management pvy

You should ensure that the date you receive is in UTC to do so, because if we change the server date format, it is possible that the year is not the 4 first digits but the 4 in the middle. So you should specify in the docstring of the method that the argument date should be an UTC date and in the method that calls this one ensure that you have a UTC date using datetime.strptime(date_string, SERVER_DATE_FORMAT).strftime('%Y-%m-%d')