The entity, such as a user or session, that does an action that causes a metric
value to be recorded. An example is userDetails.userID.
The EventBridge event pattern that defines how the metric is recorded.
For more information about EventBridge event patterns, see Amazon EventBridge event patterns.
A name for the metric.
A label for the units that the metric is measuring.
The value that is tracked to produce the metric.
This structure defines a metric that you want to use to evaluate the variations during a launch or experiment.