fix: add public type property to AuthenticationMethod base class

The _type class attribute was private, causing AttributeError when
examples or user code accessed auth.type. Add a @Property that exposes
it as a read-only public attribute.

Author: Fivell

src/didww/resources/authentication_method.py

@@ -6,6 +6,10 @@ class AuthenticationMethod:
     def __init__(self, **kwargs):
         self._attributes = kwargs
 
+    @property
+    def type(self):
+        return self._type
+
     def _attr(self, key):
         return self._attributes.get(key)
 

tests/resources/test_voice_out_trunk.py

@@ -201,3 +201,18 @@ def test_to_jsonapi_roundtrip(self):
         auth = IpOnlyAuthenticationMethod(allowed_sip_ips=["10.0.0.0/8"], tech_prefix="")
         serialized = auth.to_jsonapi()
         assert serialized == {"type": "ip_only", "attributes": {"allowed_sip_ips": ["10.0.0.0/8"], "tech_prefix": ""}}
+
+    def test_type_property_on_known_subclass(self):
+        auth = IpOnlyAuthenticationMethod(allowed_sip_ips=["203.0.113.0/24"])
+        assert auth.type == "ip_only"
+
+    def test_type_property_on_credentials_and_ip(self):
+        auth = CredentialsAndIpAuthenticationMethod(
+            allowed_sip_ips=["203.0.113.0/24"], username="u", password="p",
+        )
+        assert auth.type == "credentials_and_ip"
+
+    def test_type_property_on_generic(self):
+        data = {"type": "future_auth", "attributes": {"key": "val"}}
+        auth = AuthenticationMethod.from_jsonapi(data)
+        assert auth.type == "future_auth"