update doc: to showcase custom reqwest client

async-openai/src/client.rs

@@ -75,7 +75,8 @@ impl Client {
         self
     }
 
-    /// Exponential backoff for retrying [rate limited](https://help.openai.com/en/articles/5955598-is-api-usage-subject-to-any-rate-limits) requests. Form submissions are not retried.
+    /// Exponential backoff for retrying [rate limited](https://platform.openai.com/docs/guides/rate-limits) requests.
+    /// Form submissions are not retried.
     pub fn with_backoff(mut self, backoff: backoff::ExponentialBackoff) -> Self {
         self.backoff = backoff;
         self

async-openai/src/lib.rs

@@ -14,6 +14,10 @@
 //!
 //! // Use organization other than default when making requests
 //! let client = Client::new().with_org_id("the-org");
+//!
+//! // Use custom reqwest client
+//! let http_client = reqwest::ClientBuilder::new().user_agent("async-openai").build().unwrap();
+//! let client = Client::new().with_http_client(http_client);
 //! ```
 //!
 //! ## Making requests
@@ -27,6 +31,7 @@
 //! let client = Client::new();
 //!
 //! // Create request using builder pattern
+//! // Every request struct has companion builder struct with same name + Args suffix
 //! let request = CreateCompletionRequestArgs::default()
 //!     .model("text-davinci-003")
 //!     .prompt("Tell me the recipe of alfredo pasta")