```rust
use appwrite::Client;
use appwrite::services::Functions;
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let client = Client::new();
client.set_endpoint("https://<REGION>.cloud.appwrite.io/v1"); // Your API Endpoint
client.set_project("<YOUR_PROJECT_ID>"); // Your project ID
client.set_key("<YOUR_API_KEY>"); // Your secret API key
let functions = Functions::new(&client);
functions.delete(
"<FUNCTION_ID>"
).await?;
Ok(())
}
```