# Create/Edit An Invoice

Creates a new or updates an existing supplier invoice for the authenticated SupplierAdmin.

Endpoint: POST /SupplierInvoices
Version: 1.0.0
Security: bearerAuth

## Request fields (application/json):

  - `SupplierId` (string)
    Example: "4b0b2dcd-58b5-41a9-b8b9-202b67a828ae"

  - `InvoiceNumber` (string)
    Example: "INV-2025-001"

  - `Amount` (number)
    Example: 10000

  - `DueDate` (string)
    Example: "2025-11-01"

## Response 200 fields (application/json):

  - `success` (boolean)
    Example: true

  - `message` (string)
    Example: "Invoice created successfully."

## Response 401 fields (application/json):

  - `message` (string)
    Example: "You do not have appropriate access to this supplier."