There is an executable for this CLI hosted on GitHub for MacOS that should be ready to run.
./optionbanks -token 'fake123' -file ~/Downloads/option_banks.csv -url 'http://your-fountain-url/api/v2/option_banks
name,label,value
Option Bank Test 1, Option 1, 1
,Option 2, 2
Option Bank Test 2, Option 1, 1
,Option 2, 2
,Option 3, 3
Option Bank Test 3, Option 1, 1
,Option 2, 2