fix: update provider example

Author: jianyuan

docs/index.md

@@ -13,9 +13,27 @@ The OpenAI provider enables you to configure resources and data sources for your
 ## Example Usage
 
 ```terraform
+# Configure the OpenAI provider
 provider "openai" {
   admin_key = "sk-admin-0000000000000000000000000000000000000000"
 }
+
+# Create a project
+resource "openai_project" "example" {
+  name = "Example Project"
+}
+
+# Create a service account for the project
+resource "openai_project_service_account" "example" {
+  project_id = openai_project.example.id
+  name       = "my-service-account"
+}
+
+# Output the API key for the service account
+output "service_account_api_key" {
+  sensitive = true
+  value     = openai_project_service_account.example.api_key
+}
 ```
 
 <!-- schema generated by tfplugindocs -->

examples/provider/provider.tf

@@ -1,3 +1,21 @@
+# Configure the OpenAI provider
 provider "openai" {
   admin_key = "sk-admin-0000000000000000000000000000000000000000"
 }
+
+# Create a project
+resource "openai_project" "example" {
+  name = "Example Project"
+}
+
+# Create a service account for the project
+resource "openai_project_service_account" "example" {
+  project_id = openai_project.example.id
+  name       = "my-service-account"
+}
+
+# Output the API key for the service account
+output "service_account_api_key" {
+  sensitive = true
+  value     = openai_project_service_account.example.api_key
+}