feat: add create membership for group code sample (#1809)

Co-authored-by: pierrick <pierrick@google.com>

Author: PierrickVoulet

chat/client-libraries/cloud/create_membership_user_cred_for_group.py

@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# It may require modifications to work in your environment.
+
+# To install the latest published package dependency, execute the following:
+#   python3 -m pip install google-apps-chat
+
+
+# [START chat_create_membership_user_cred_for_group]
+from authentication_utils import create_client_with_user_credentials
+from google.apps import chat_v1 as google_chat
+
+SCOPES = ["https://www.googleapis.com/auth/chat.memberships"]
+
+# This sample shows how to create membership with user credential for a group
+def create_membership_with_user_cred_for_group():
+    # Create a client
+    client = create_client_with_user_credentials(SCOPES)
+
+    # Initialize request argument(s)
+    request = google_chat.CreateMembershipRequest(
+        # Replace SPACE_NAME here
+        parent = "spaces/SPACE_NAME",
+        membership = {
+            "groupMember": {
+                # Replace GROUP_NAME here
+                "name": "groups/GROUP_NAME"
+            }
+        }
+    )
+
+    # Make the request
+    response = client.create_membership(request)
+
+    # Handle the response
+    print(response)
+
+create_membership_with_user_cred_for_group()
+
+# [END chat_create_membership_user_cred_for_group]