improve documentation; correctly handle empty zoom auth

Author: cody-eding

docs/providers/documentation/zoom_chat-provider.mdx

@@ -41,6 +41,10 @@ This channel will be the recipient of the Keep notifications.
 
 Send `/inc connect <connection name>` to the channel to enable a webhook with authorization code. The app will respond with the webhook url and authorization code.
 
+<Tip>
+You should use the "Full Format" Incoming Webhook Url, which ends in `?format=full`.
+</Tip>
+
 <Frame width="100" height="200">
   <img height="10" src="/images/zoom_chat-provider5.png" />
 </Frame>
@@ -49,9 +53,9 @@ Send `/inc connect <connection name>` to the channel to enable a webhook with au
   <img height="10" src="/images/zoom_chat-provider6.png" />
 </Frame>
 
-## Enabling User JID Lookup (Optional)
+## (Optional) Enabling User JID Lookup 
 
-Messages can optionally include Zoom user JIDs, which provide a way to tag a particular Zoom user in a message. 
+Messages can optionally include Zoom user JIDs, which are used to tag a particular Zoom user in a message. 
 This is useful, for example, if a team subscribes to a chat channel but members only wish to be notified when they are explicitly tagged.
 
 ### Create a Zoom Application

docs/snippets/providers/zoom_chat-snippet-autogenerated.mdx

@@ -3,7 +3,7 @@ Do not edit it manually, as it will be overwritten */}
 
 ## Authentication
 This provider requires authentication.
-- **webhook_url**: Zoom Incoming Webhook Url (required: True, sensitive: True)
+- **webhook_url**: Zoom Incoming Webhook Full Format Url (required: True, sensitive: True)
 - **authorization_token**: Incoming Webhook Authorization Token (required: True, sensitive: True)
 - **account_id**: Zoom Account ID (required: False, sensitive: True)
 - **client_id**: Zoom Client ID (required: False, sensitive: True)

keep/providers/zoom_chat_provider/zoom_chat_provider.py

@@ -28,7 +28,7 @@ class ZoomChatProviderAuthConfig:
     webhook_url: HttpsUrl = dataclasses.field(
         metadata={
             "name": "webhook_url",
-            "description": "Zoom Incoming Webhook Url",
+            "description": "Zoom Incoming Webhook Full Format Url",
             "required": True,
             "sensitive": True,
             "validation": "https_url",
@@ -42,21 +42,24 @@ class ZoomChatProviderAuthConfig:
             "sensitive": True,
         },
     )
-    account_id: str = dataclasses.field(
+    account_id: Optional[str] = dataclasses.field(
+        default="zoom_account_id",
         metadata={
             "required": False,
             "description": "Zoom Account ID",
             "sensitive": True,
         }
     )
-    client_id: str = dataclasses.field(
+    client_id: Optional[str] = dataclasses.field(
+        default="zoom_client_id",
         metadata={
             "required": False,
             "description": "Zoom Client ID",
             "sensitive": True,
         }
     )
-    client_secret: str = dataclasses.field(
+    client_secret: Optional[str] = dataclasses.field(
+        default="zoom_client_secret",
         metadata={
             "required": False,
             "description": "Zoom Client Secret",