# 201 Create a Servicebus with Topic and Subscription
For information about using this template, see [Create a Service Bus namespace with Topic and Subscription using an ARM template](http://azure.microsoft.com/documentation/articles/service-bus-resource-manager-namespace-topic/).
## main.tf
The `main.tf` file contains the actual resources that will be deployed. It also contains the Azure Resource Group definition and any defined variables.
## outputs.tf
This data is outputted when `terraform apply` is called, and can be queried using the `terraform output` command.
## provider.tf
Azure requires that an application is added to Azure Active Directory to generate the `client_id`, `client_secret`, and `tenant_id` needed by Terraform (`subscription_id` can be recovered from your Azure account details). Please go [here](https://www.terraform.io/docs/providers/azurerm/) for full instructions on how to create this to populate your `provider.tf` file.
If a `terraform.tfvars` or any `.auto.tfvars` files are present in the current directory, Terraform automatically loads them to populate variables. We don't recommend saving usernames and password to version control, but you can create a local secret variables file and use the `-var-file` flag or the `.auto.tfvars` extension to load it.
