video_calls: Add default password to zoom meetings.

The password will be included in the meeting link, so users won't have
to type it in manually. Example of the newly generated URLs:

https://DOMAIN.zoom.us/j/MEETING_NUMBER?pwd=ENCODED_PASSWORD

This improves the experience in Zoom organizations requiring
authentication for all meetings, as otherwise the waiting room is
forcibly enabled.

zerver/tests/test_create_video_call.py

@@ -78,6 +78,7 @@ class TestVideoCall(ZulipTestCase):
                     "host_video": True,
                     "participant_video": True,
                 },
+                "default_password": True,
             },
         )
         self.assertEqual(
@@ -113,6 +114,7 @@ class TestVideoCall(ZulipTestCase):
                     "host_video": False,
                     "participant_video": False,
                 },
+                "default_password": True,
             },
         )
         self.assertEqual(

zerver/views/video_calls.py

@@ -162,7 +162,14 @@ def make_zoom_video_call(
         "settings": {
             "host_video": is_video_call,
             "participant_video": is_video_call,
-        }
+        },
+        # Generate a default password depending on the user settings. This will
+        # result in the password being appended to the returned Join URL.
+        #
+        # If we don't request a password to be set, the waiting room will be
+        # forcibly enabled in Zoom organizations that require some kind of
+        # authentication for all meetings.
+        "default_password": True,
     }
 
     try: