Enhanced Split Pay

// Normal Settlement call
curl https://finix.sandbox-payments-api.com/identities/IDxxxxx/settlements \
    -H "Content-Type: application/vnd.json+api" \
    -u  USckpcZHua1RRGW7iNSQsH2S:bbf084b5-f704-4917-abc9-6bbb96e2484b \
    -d '
    {
        "currency": "USD",
        "processor": "DUMMY_V1"
    }'
    
// Then reference that Settlement when you hit the 
curl POST  https://finix.live-payments-api.com/settlements/{settlement_id}/funding_transfers \
    -H "Content-Type: application/vnd.json+api" \
    -u  USckpcZHua1RRGW7iNSQsH2S:bbf084b5-f704-4917-abc9-6bbb96e2484b \
    -d '
    {
        "currency": "USD",
        "amount": 1510, 
        "destination": "PIw6Eb4hdLRWjbB9ciFFogo"
    }'