metadata property
BETA Metadata to provide additional information about the participant.
This field can be used to attach dynamic, custom key-value data (e.g., name, email, etc.). that may be used for advanced features like personalization or analytics.
If you plan to use the attendance tracking feature, make sure to include a
unique "identifier" key in this map.
This field is experimental and may change in future versions.
Implementation
final Map<String, dynamic>? metadata;