ARM get EventHub Namespace shareAcessPolicyKey - azure

Question

My goal is to deploy a streaming analytics who contain an eventhub as input. To do this, I need to get the shareAcessPolicyKey. After some search, I found the ListKeys function but still not working for my case.
{
"error": {
"code": "ResourceNotFound",
"message": "The Resource 'Microsoft.ServiceBus/namespaces/tbiNamespace' under resource group 'devOps' was not found."
}
.
EDIT - Solution
"sharedAccessPolicyKey": "[listKeys(resourceId('Microsoft.Eventhub/namespaces/authorizationRules',parameters('namespaces'), parameters('AuthorizationRules_name')),'2017-04-01').primaryKey]"
Create the namespaces rules
{
"type": "Microsoft.EventHub/namespaces/AuthorizationRules",
"name": "[concat(parameters('namespaces_tornosbi_name'), '/', parameters('AuthorizationRules_RootManageSharedAccessKey_name'))]",
"apiVersion": "2017-04-01",
"location": "North Europe",
"scale": null,
"properties": {
"rights": [
"Listen",
"Manage",
"Send"
]
},
"dependsOn": [
"[resourceId('Microsoft.EventHub/namespaces', parameters('namespaces_tornosbi_name'))]"
]
},
create the resource streaming jobs input
"resources": [{
"type": "Microsoft.StreamAnalytics/streamingjobs/inputs",
"name": "[concat(parameters('streamingjobs_tornosbi_name'), '/', parameters('inputs_eh_input_name'))]",
"apiVersion": "2016-03-01",
"scale": null,
"properties": {
"type": "Stream",
"datasource": {
"type": "Microsoft.ServiceBus/EventHub",
"properties": {
"eventHubName": "[parameters('eventhubs_tornosbi_hub_name')]",
"serviceBusNamespace": "[parameters('namespaces_tornosbi_name')]",
"sharedAccessPolicyName": "[parameters('AuthorizationRules_RootManageSharedAccessKey_name')]",
"sharedAccessPolicyKey": "[listKeys(resourceId(concat('Microsoft.ServiceBus/namespaces/','eventhub','/authorizationRules'),parameters('namespaces_tornosbi_name'),parameters('eventhubs_tornosbi_hub_name'),parameters('AuthorizationRules_RootManageSharedAccessKey_name')),'2016-03-01').primaryKey]"
}
},
"compression": {
"type": "None"
},
"serialization": {
"type": "Json",
"properties": {
"encoding": "UTF8"
}
}
},
"dependsOn": [
"[resourceId('Microsoft.StreamAnalytics/streamingjobs', parameters('streamingjobs_tornosbi_name'))]",
"[resourceId('Microsoft.EventHub/namespaces', parameters('namespaces_tornosbi_name'))]",
"[resourceId('Microsoft.EventHub/namespaces/eventhubs', parameters('namespaces_tornosbi_name'), parameters('eventhubs_tornosbi_hub_name'))]"
]
},

Answer 1

the error clearly states there is no such resource in the resource group. Impossible to help you without knowing where the resource is, but resourceId() function accepts resource group and subscription as arguments:
resourceId(subscription, resourcegroup, 'Microsoft.ServiceBus/namespaces/eventhub/authorizationRules',
namespace, eventhub, rule)
ps. you dont need to do concat('Microsoft.ServiceBus/namespaces/','eventhub','/authorizationRules'), just use a string