internal/arms/API.Storage.BlobOrFile.AccessKey.json

{
    "type": "Microsoft.Web/connections",
    "apiVersion": "2016-06-01",
    "name": "##NAME##",
    "location": "[parameters('logicAppLocation')]",
    "properties": {
        "api": {
            "id": "[subscriptionResourceId('Microsoft.Web/locations/managedApis', parameters('logicAppLocation'), '##TYPE##')]"
        },
        "displayName": "##NAME##",
        "parameterValues": {
            "accountName": "##ACCOUNTNAME##",
            "accessKey": "[listKeys(resourceId('##SUSCRIPTIONID##', '##RESOURCEGROUPNAME##', 'Microsoft.Storage/storageAccounts', '##ACCOUNTNAME##'), providers('Microsoft.Storage', 'storageAccounts').apiVersions[0]).keys[0].value]"
        }
    }
}