task: Add serialize impl for ApiError

- Adds the `serde::Serialize` derive macro to the `ApiError` type so
  that this error can be passed along the wire to clients for proxies

Author: tomharmon

async-openai/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "async-openai"
-version = "0.28.3"
+version = "0.28.4"
 authors = ["Himanshu Neema"]
 categories = ["api-bindings", "web-programming", "asynchronous"]
 keywords = ["openai", "async", "openapi", "ai"]

async-openai/src/error.rs

@@ -1,5 +1,5 @@
 //! Errors originating from API calls, parsing responses, and reading-or-writing to the file system.
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
 #[derive(Debug, thiserror::Error)]
 pub enum OpenAIError {
@@ -28,7 +28,7 @@ pub enum OpenAIError {
 }
 
 /// OpenAI API returns error object on failure
-#[derive(Debug, Deserialize, Clone)]
+#[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct ApiError {
     pub message: String,
     pub r#type: Option<String>,

async-openai/src/lib.rs

@@ -103,7 +103,7 @@
 //! ```
 //! use async_openai::{Client, config::Config, config::OpenAIConfig};
 //! unsafe { std::env::set_var("OPENAI_API_KEY", "only for doc test") }
-//! 
+//!
 //! let openai_config = OpenAIConfig::default();
 //! // You can use `std::sync::Arc` to wrap the config as well
 //! let config = Box::new(openai_config) as Box<dyn Config>;