Merchants Management

• Create a seller: POST /create-seller
• Update a seller: POST /update-seller
• Upload seller files: POST /upload-seller-files
• List a seller's services: POST /get-vas-seller
• Withdraw a seller's balance: POST /withdraw-balance
• List a seller's public keys: GET /sellers/{seller_payme_id}/public-keys
• List business fields: GET /business-fields
• Attach a saved card to a seller: POST /add-card-to-seller