¿Cómo puedo acceder al valor de Array usando el nombre de la clave en nodejs? Me estoy volviendo undefined cuando intento acceder a él de la siguiente manera. Quiero que se imprima el valor al llamar a la tecla.

 var sns_DimensionsValue = sns.Trigger.Dimensions['ApiName'] console.log(sns_DimensionsValue)

Json Data:

 { "AlarmName": "Zabbix PY 5XX - ByName", "AlarmDescription": null, "AWSAccountId": 123456789", "NewStateValue": "ALARM", "NewStateReason": "Threshold Crossed: 1 out of the last 1 datapoints [1.0 (11/11/21 13:51:00)] was greater than or equal to the threshold (1.0) (minimum 1 datapoint for OK -> ALARM transition).", "StateChangeTime": "2021-11-11T13:52:09.318+0000", "Region": "Asia Pacific (Mumbai)", "AlarmArn": "arn:aws:cloudwatch:ap-south-1:123456789:alarm:Zabbix PY 5XX - ByName", "OldStateValue": "INSUFFICIENT_DATA", "Trigger": { "MetricName": "5XXError", "Namespace": "AWS/ApiGateway", "StatisticType": "Statistic", "Statistic": "MINIMUM", "Unit": null, "Dimensions": [ { "value": "zabbixPy-API", "name": "ApiName" } ], "Period": 60, "EvaluationPeriods": 1, "ComparisonOperator": "GreaterThanOrEqualToThreshold", "Threshold": 1, "TreatMissingData": "- TreatMissingData: missing", "EvaluateLowSampleCountPercentile": "" } }