Callbacks service docs updated

interface/api/payment_methods/bodies/payment_method.yaml

@@ -1,6 +1,7 @@
 components:
   requestBodies:
     PaymentMethodBody:
+      description: JSON body containing a payment method definition.
       required: true
       content:
         application/json:

interface/api/payment_methods/request/payment_method.yaml

@@ -1,4 +1,5 @@
 components:
   schemas:
     PaymentMethodRequest:
+      description: Request payload used to create or update a payment method.
       $ref: ../../../models/payment_method/payment_method.yaml#/components/schemas/PaymentMethod

interface/api/payment_methods/response/payment_method.yaml

@@ -1,6 +1,7 @@
 components:
   schemas:
     Payment MethodsAuthData:
+      description: Authenticated response payload containing payment methods.
       type: object
       additionalProperties: false
       required:
@@ -8,8 +9,10 @@ components:
         - payment_methods
       properties:
         accessToken:
+          description: Refreshed access token to be used in subsequent API calls.
           $ref: ../../../models/auth/token_data.yaml#/components/schemas/TokenData
         payment_methods:
+          description: Collection of payment methods available to the authenticated account.
           type: array
           items:
             $ref: ../../../models/payment_method/payment_method.yaml#/components/schemas/PaymentMethod