The example is wrong.
Get rid of the extra comma after the second FindUserById() statement.
Probably easier to see as:
MakeListAgentScorePair(
MakeList(
FindUserById("731023c0-16df-48e6-acf7-11659b75c5f1"),
FindUserById("731023c0-16df-48e6-acf7-11659b75c5f1")
),
MakeList(100,90)
)------------------------------
George Ganahl GCP (PureCloud) ICCE CCXP
Principal Technology Consultant
Genesys
------------------------------