[REF] api: Optimize address update condition in create_address

The code now combines the condition 'only_create' and 'address' into a single line, ensuring that an address is only updated if it exists and it is not flagged with the 'only_create' option. This change makes the code easier to read and understand.

Closes #25

hantec_api_ecommerce/controllers/main.py

@@ -149,9 +149,7 @@ def create_address(self):
             [("parent_id", "=", partner_id), ("type", "=", address_type)], limit=1
         )
 
-        if only_create:
-            address = False
-        if address:
+        if address and not only_create:
             # Update existing address
             address.write(address_data)
         else: