How to use the astroplan.download_IERS_A function in astroplan

def download_all_files(self):
        """Downloads the files according to the attributes of this object."""
        result = True
        try:
            download_IERS_A()
        except Exception as e:
            if not self.keep_going:
                raise e
            print('Failed to download IERS A bulletin: {}'.format(e))
            result = False
        if self.wide_field:
            for i in range(4110, 4119):
                if not self.download_one_file('4100/index-{}.fits'.format(i)):
                    result = False
        if self.narrow_field:
            for i in range(4210, 4219):
                if not self.download_one_file('4200/index-{}.fits'.format(i)):
                    result = False
        return result

def download_all_files(self):
        """Downloads the files according to the attributes of this object."""
        result = True
        try:
            download_IERS_A()
        except Exception as e:
            if not self.keep_going:
                raise e
            print('Failed to download IERS A bulletin: {}'.format(e))
            result = False
        if self.wide_field:
            for i in range(4110, 4119):
                if not self.download_one_file('4100/index-{}.fits'.format(i)):
                    result = False
        if self.narrow_field:
            for i in range(4210, 4219):
                if not self.download_one_file('4200/index-{}.fits'.format(i)):
                    result = False
        return result