vendors

• GET /v1/vendors —
• POST /v1/vendors —
• DELETE /v1/vendors —
• GET /v1/vendors/{id} —
• PUT /v1/vendors/{id} —
• GET /v1/vendors/po-sources —
• POST /v1/vendors/po-sources —
• DELETE /v1/vendors/po-sources —
• GET /v1/vendors/po-sources/warehouses —