JSONDecodeError Raised from OnePassword.get_item()

[Conrad-E-Alitheon]

Describe the bug
When you call the get_item() function with a valid item Id and list containing invalid invalid field names:
op = OnePassword()
op.get_item(id="valid_id_1234", ["invalid_field1","invalid_field2"])

You get the error Message:
[ERROR] 2025/03/20 15:14:32 "invalid_field1" isn't a field in the "BAD" item

And then you get:

---

JSONDecodeError Traceback (most recent call last)
...
ssword/client.py:437, in OnePassword.get_item(uuid, fields, vault)
435 vault_flag = f"--vault {vault}" if vault else ""
436 if isinstance(fields, list):
--> 437 item_list = json.loads(read_bash_return(
438 "op item get {} --format=json --fields label={} {}".format(uuid, ",label=".join(fields), vault_flag),
439 single=False))
440 item = {}
441 if isinstance(item_list, dict):
...

To Reproduce
Steps to reproduce the behavior:
replace the entry id below with a valid id from op.list_items():
op = OnePassword()
op.get_item(id="valid_id_1234", ["invalid_field1","invalid_field2"])

Expected behavior
return the error without raising a JSONDecodeException

Desktop (please complete the following information):

• OS: Ubuntu 20.04.6
• Firefox
  pip 1password == 1.1.3
  op cli version 2.30.3

[dtpryce]

Thanks for the issue submission! Will have a look when we have time, hopefully in coming week! Feel free to submit a PR also if you think you can fix it :D