Fix embedding response

examples/embedding.rs

@@ -0,0 +1,19 @@
+use openai_api_rs::v1::api::Client;
+use openai_api_rs::v1::embedding::EmbeddingRequest;
+use std::env;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let client = Client::new(env::var("OPENAI_API_KEY").unwrap().to_string());
+    let req = EmbeddingRequest {
+        model: "text-embedding-ada-002".to_string(),
+        input: "story time".to_string(),
+        user: Option::None,
+    };
+    let result = client.embedding(req).await?;
+    println!("{:?}", result.data);
+
+    Ok(())
+}
+
+// OPENAI_API_KEY=xxxx cargo run --package openai-api-rs --example embedding