Rename __json__() to asdict()

tests/compute/builtin/nodes/test_cloud.py

@@ -51,7 +51,7 @@ async def test_json_with_ports(on_gns3vm, compute_project, manager):
         }
     ]
     cloud = Cloud("cloud1", str(uuid.uuid4()), compute_project, manager, ports=ports)
-    assert cloud.__json__() == {
+    assert cloud.asdict() == {
         "name": "cloud1",
         "usage": "",
         "node_id": cloud.id,
@@ -84,7 +84,7 @@ def test_json_without_ports(on_gns3vm, compute_project, manager):
     """
 
     cloud = Cloud("cloud1", str(uuid.uuid4()), compute_project, manager, ports=None)
-    assert cloud.__json__() == {
+    assert cloud.asdict() == {
         "name": "cloud1",
         "usage": "",
         "node_id": cloud.id,