Major update

app/api/schemas/bulk_sms.py

@@ -0,0 +1,18 @@
+from marshmallow import Schema, fields
+
+# Individual SMS item schema for BulkSMS
+class BulkSMSItemSchema(Schema):
+    text = fields.Str(required=True, description="Message to send to customer")
+    dest = fields.Str(required=True, description="Phone Number in international format")
+    unicode = fields.Bool(required=True, description="Character encoding standard (set as True for bulk SMS)")
+
+# BulkSMS Request Schema (list of SMS items)
+class BulkSMSSchema(Schema):
+    _schema = fields.List(fields.Nested(BulkSMSItemSchema), required=True)
+
+# BulkSMS Response Schema
+class BulkSMSResponseSchema(Schema):
+    data = fields.Str(required=True, description="Any additional data in response")
+    statusCode = fields.Int(required=True, description="Result code of executed process (200 = Success)")
+    IsSuccessful = fields.Bool(required=True, description="An Indicator that the process was successful or not")
+    errorMessage = fields.Str(required=True, allow_none=True, description="Description of status code if process is failed, null if successful")