Variable when passed through a function returns property of value undefined. I'm passing variable ApiId or ApiName. Should the variable name be wrapped some other way inside the function?

I'm using this answer method and using it inside a function.

   function dimensionValue(name) {
       console.log("Testing")
       return sns.Trigger.Dimensions.find(dimension => dimension.name === name).value
   }

If I try to console.log then it works fine.

console.log(sns.Trigger.Dimensions.find(dimension => dimension.name === 'ApiId').value)

Error:

ERROR   Invoke Error    
{
    "errorType": "TypeError",
    "errorMessage": "Cannot read property 'value' of undefined",
    "stack": [
        "TypeError: Cannot read property 'value' of undefined",
        "    at dimensionValue (/var/task/index.js:20:80)",
        "    at Runtime.exports.handler (/var/task/index.js:37:36)",
        "    at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)"
    ]
}

code:

   function dimensionValue(name) {
       console.log("Testing")
       //var dimensionsValue = sns.Trigger.Dimensions.find(dimension => dimension.name === name).value 
       return sns.Trigger.Dimensions.find(dimension => dimension.name === name).value
   }
   
   
  if (sns.Trigger.Namespace == "AWS/ApiGateway") {
      console.log("Testing2")
    if (sns.Trigger.Dimensions.find(dimension => dimension.name === 'ApiId') && sns.Trigger.Dimensions.find(dimension => dimension.name === 'Stage')) {
        console.log('ApiId and Stage')
        var sns_DimensionsValue = dimensionValue('ApiId') + '_' + dimensionValue('Stage')
    } else if (sns_DimensionsValue == sns.Trigger.Dimensions.find(dimension => dimension.name === 'ApiName') &&  sns.Trigger.Dimensions.find(dimension => dimension.name === 'Stage')) {
        console.log('ApiName and Stage')
        var sns_DimensionsValue =  dimensionValue('ApiName') + '_' +  dimensionValue('Stage') 
    } else if (sns_DimensionsValue == sns.Trigger.Dimensions.find(dimension => dimension.name === 'ApiId')) {
        console.log('ApiId')
        var sns_DimensionsValue =  dimensionValue('ApiId')    
    } else if (sns_DimensionsValue == sns.Trigger.Dimensions.find(dimension => dimension.name === 'ApiName')) {
         console.log('ApiName')
        var sns_DimensionsValue =  dimensionValue('ApiName')    
    }
  }