Allow recommender to potentially be null
Allow recommender to potentially be null

ppy/osu,peppy/osu,peppy/osu-new,peppy/osu,UselessToucan/osu,UselessToucan/osu,peppy/osu,smoogipoo/osu,smoogipoo/osu,NeoAdonis/osu,NeoAdonis/osu,smoogipoo/osu,NeoAdonis/osu,ppy/osu,ppy/osu,UselessToucan/osu,smoogipooo/osu