```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_session(""); // The user session to authenticate with
let functions = Functions::new(&client);
let result = functions.create_execution(
"<FUNCTION_ID>",
Some("<BODY>"), // optional
Some(false), // optional
Some("<PATH>"), // optional
Some(appwrite::enums::ExecutionMethod::GET), // optional
Some(serde_json::json!({})), // optional
Some("<SCHEDULED_AT>") // optional
).await?;
let _ = result;
Ok(())
}
```