configuration: made 'default' AI ID optional

tests/test_ai_factory.py

@@ -10,7 +10,7 @@ from chatmastermind.ais.openai import OpenAI
 class TestCreateAI(unittest.TestCase):
     def setUp(self) -> None:
         self.args = MagicMock(spec=argparse.Namespace)
-        self.args.AI = 'default'
+        self.args.AI = 'myopenai'
         self.args.model = None
         self.args.max_tokens = None
         self.args.temperature = None
@@ -18,7 +18,7 @@ class TestCreateAI(unittest.TestCase):
     def test_create_ai_from_args(self) -> None:
         # Create an AI with the default configuration
         config = Config()
-        self.args.AI = 'default'
+        self.args.AI = 'myopenai'
         ai = create_ai(self.args, config)
         self.assertIsInstance(ai, OpenAI)