Terraform Azure App Service - ip_restrictions

I am trying to set the IP restrictions block in my Azure App Service App

When performing the Terraform plan or apply, I receive the following error: Error: azurerm_app_service.app-service-1: : invalid or unknown key: ip_restriction

I used ip_restriction per Terraform Documentation for App Service (Web Apps) Resources

Here is the AppService deployment code i am using:

resource "azurerm_app_service" "app-service-1" {
  name                    = "${var.app_service_1}"
  location                = "${data.azurerm_resource_group.core-rg.location}"
  resource_group_name     = "${data.azurerm_resource_group.core-rg.name}"
  app_service_plan_id     = "${data.azurerm_app_service_plan.app-service-plan-1.id}"
  https_only              = "True"
  enabled                 = "True"
  client_affinity_enabled = "True"

  site_config {
    always_on                 = "True"
    #default_documents        = ""
    dotnet_framework_version  = "v4.0"
    #http2_enabled            = ""
    #ip_restriction           = ""
    #java_version             = ""
    #java_container           = ""
    #java_container_version   = ""
    managed_pipeline_mode     = "Integrated"
    min_tls_version           = "1.2"
    #php_version              = ""
    #python_version           = ""
    remote_debugging_enabled  = "False"
    #remote_debugging_version = ""
    scm_type                  = "None"
    use_32_bit_worker_process = "False"
    websockets_enabled        = "True"
    #ftps_state               = ""
  }

  app_settings {
    "KeyVaultURI" = ""
    "WEBSITE_NODE_DEFAULT_VERSION" = "6.9.1"
  }

  ip_restriction {
   "ip_address"     = ""
   }

Thank you

For those interested, here is the method to use ipRestrictions in Terraform

ip Restrictions is part of the Site_Config {}

See how to use below:

AppService.tf:

resource "azurerm_app_service" "app-service-1" {
  name                    = "${var.app_service_1}"
  location                = "${data.azurerm_resource_group.core-rg.location}"
  resource_group_name     = "${data.azurerm_resource_group.core-rg.name}"
  app_service_plan_id     = "${data.azurerm_app_service_plan.app-service-plan-1.id}"
  https_only              = "True"
  enabled                 = "True"
  client_affinity_enabled = "True"
  site_config {
    always_on                 = "True"
    #default_documents        = ""
    dotnet_framework_version  = "v4.0"
    #http2_enabled            = ""
    #ip_restriction           = ""
    #java_version             = ""
    #java_container           = ""
    #java_container_version   = ""
    managed_pipeline_mode     = "Integrated"
    min_tls_version           = "1.2"
    #php_version              = ""
    #python_version           = ""
    remote_debugging_enabled  = "False"
    #remote_debugging_version = ""
    scm_type                  = "None"
    use_32_bit_worker_process = "False"
    websockets_enabled        = "True"
    #ftps_state               = ""
    ip_restriction {
      ip_address  = "${var.ip_address_1}"
    }
    ip_restriction {
      ip_address  = "${var.ip_address_2}"
    }
    ip_restriction {
      ip_address  = "${var.ip_address_3}"
    }
  }
  app_settings {
    "KeyVaultURI" = ""
    "WEBSITE_NODE_DEFAULT_VERSION" = "6.9.1"
    }
  }