How to create azure postgres using terraform?

Created VNet and two subnets first and pass the values as variables to terraform.

az group create -n TestingTFCLI -l CentralUS
az network vnet create -g TestingTFCLI -n myVNET --address-prefixes 10.0.0.0/8
az network nsg create -g TestingTFCLI -n MyNsg --tags super_secure no_80 no_22
az network vnet subnet create -n mySubNet -g TestingTFCLI --vnet-name myVNET --address-prefixes 10.240.0.0/16 --network-security-group MyNsg
az network vnet subnet create -n mySubNet1 -g TestingTFCLI --vnet-name myVNET --address-prefixes 10.230.0.0/16 --network-security-group MyNsg
az network vnet subnet update --resource-group TestingTFCLI --name mySubNet1 --vnet-name myVNET --delegations Microsoft.DBforPostgreSQL/flexibleServers

I tried creating azure postgres with below template, but getting error as InternalServerError code.

provider "azurerm" {
  features {}
}

resource "azurerm_resource_group" "example" {
  name     = "example-resources"
  location = "Central US"
}

resource "azurerm_private_dns_zone" "example" {
  name                = "example.postgres.database.azure.com"
  resource_group_name = azurerm_resource_group.example.name
}

resource "azurerm_private_dns_zone_virtual_network_link" "example" {
  name                  = "exampleVnetZone.com"
  private_dns_zone_name = azurerm_private_dns_zone.example.name
  virtual_network_id    = var.virtual_network_id
  resource_group_name   = azurerm_resource_group.example.name
}

resource "azurerm_postgresql_flexible_server" "example" {
  name                   = "example-psqlflexibleserver2022-1"
  resource_group_name    = azurerm_resource_group.example.name
  location               = azurerm_resource_group.example.location
  version                = "13"
  delegated_subnet_id    = var.subnet_id
  private_dns_zone_id    = azurerm_private_dns_zone.example.id
  administrator_login    = var.username
  administrator_password = var.password
  zone                   = "1"

  storage_mb = 131072

  sku_name   = "GP_Standard_D2s_v3"
  depends_on = [azurerm_private_dns_zone_virtual_network_link.example]

}

error:

│ Error: waiting for creation of the Postgresql Flexible Server "example-psqlflexibleserver2022-1" (Resource Group "example-resources"): Future#WaitForCompletion: context has been cancelled: StatusCode=200 -- Original Error: context deadline exceeded
│
│   with azurerm_postgresql_flexible_server.example,
│   on main.tf line 22, in resource "azurerm_postgresql_flexible_server" "example":
│   22: resource "azurerm_postgresql_flexible_server" "example" {