Fix crash when closing an async client.

.generator/src/generator/templates/api_client.j2

@@ -574,6 +574,9 @@ class AsyncApiClient(ApiClient):
             raise exc
         await self.rest_client._client.shutdown()
 
+    def close(self):
+        self.rest_client.close()
+
     async def _call_api(
         self,
         method: str,

.generator/src/generator/templates/rest.j2

@@ -241,6 +241,10 @@ class AsyncRESTClientObject:
         self._client = aiosonic.HTTPClient(proxy=proxy, verify_ssl=configuration.verify_ssl)
         self._configuration = configuration
 
+    def close(self):
+        # aiosonic doesn't close its clients
+        pass
+
     def _retry(self, method, response, counter):
         if (not self._configuration.enable_retry
             or counter >= self._configuration.max_retries

src/datadog_api_client/api_client.py

@@ -573,6 +573,9 @@ async def __aexit__(self, _exc_type, exc, _tb):
             raise exc
         await self.rest_client._client.shutdown()
 
+    def close(self):
+        self.rest_client.close()
+
     async def _call_api(
         self,
         method: str,

src/datadog_api_client/rest.py

@@ -243,6 +243,10 @@ def __init__(self, configuration):
         self._client = aiosonic.HTTPClient(proxy=proxy, verify_ssl=configuration.verify_ssl)
         self._configuration = configuration
 
+    def close(self):
+        # aiosonic doesn't close its clients
+        pass
+
     def _retry(self, method, response, counter):
         if (
             not self._configuration.enable_retry

tests/test_async.py

@@ -70,3 +70,7 @@ async def test_body():
         api_instance = metrics_api.MetricsApi(api_client)
         _, code, headers = await api_instance.submit_metrics(body=body)
         assert code == 202
+
+
+def test_close():
+    AsyncApiClient(Configuration()).close()