Source

Live result of ft_balance_of({"account_id":"gaballs-squad.sputnikv2.testnet"}) on usdt.gaballs.testnet.

Reproduce it yourself:

near contract call-function as-read-only usdt.gaballs.testnet ft_balance_of json-args '{"account_id":"gaballs-squad.sputnikv2.testnet"}' network-config testnet now

"19045823"