Use the arguments MaxHubNum and MaxAuthorityNum to output a maximum of two hub and two authority users.
SELECT * FROM pSALSA( ON users_vertex AS vertices PARTITION BY username ON users_edges AS edges PARTITION BY followers SourceKey ('followers ') TargetKey ('leaders ') EdgeWeight ('likes') MaxHubNum ('2') MaxAuthorityNum ('2') TeleportProb ('0.15') RandomWalkLength ('1000') ) ORDER BY 1, 3 DESC, 5 DESC;