integer in YYYYYYYY (e.g., 20242025); see seasons() for
reference
game_type
integer in 1:3 (where 1 = pre-season, 2 = regular season, 3
= playoff/post-season) OR character of 'pre', 'regular', or
playoff'/'post'; see seasons() for reference; most functions will NOT
support pre-season
category
string of 'a'/'assists', 'g'/goals',
'shg'/'shorthanded goals', 'ppg'/'powerplay goals', 'p'/'points',
'pim'/penalty minutes'/'penalty infraction minutes', 'toi'/'time on ice',
'pm'/'plus minus', or 'f'/'faceoffs'