get https://api02.naturalhr.net/api/v1/expenses//lines
| fieldname | format | example |
|---|---|---|
| line_category | string | 123 |
| line_date | yyyy-mm-dd | 2025-05-02 |
| line_amount | decimal(10,2) | 23.45 |
| line_reference1 | string | 123 |
| line_reference2 | string | 234 |
| line_reference3 | string | 345 |
| line_tax | decimal(10,2) | 45.67 |
| line_billable | 0 or 1 | 1 |