Implement AuthorizationCodeProvider for U2M OAuth flow\n\nTask ID: task-3.2-u2m-provider

Author: vikrantpuppala

rust/src/auth/mod.rs

@@ -19,7 +19,7 @@ pub mod oauth;
 pub mod pat;
 
 pub use config::{AuthConfig, AuthType};
-pub use oauth::ClientCredentialsProvider;
+pub use oauth::{AuthorizationCodeProvider, ClientCredentialsProvider};
 pub use pat::PersonalAccessToken;
 
 use crate::error::Result;

rust/src/auth/oauth/m2m.rs

@@ -57,6 +57,7 @@ use std::sync::Arc;
 /// # Example
 ///
 /// ```no_run
+/// use databricks_adbc::auth::AuthProvider;
 /// use databricks_adbc::auth::oauth::m2m::ClientCredentialsProvider;
 /// use databricks_adbc::client::http::{DatabricksHttpClient, HttpClientConfig};
 /// use std::sync::Arc;

rust/src/auth/oauth/mod.rs

@@ -27,9 +27,11 @@ pub mod m2m;
 pub mod oidc;
 pub mod token;
 pub(crate) mod token_store;
+pub mod u2m;
 
 // Re-export the main types
 pub use callback::CallbackServer;
 pub use m2m::ClientCredentialsProvider;
 pub use oidc::OidcEndpoints;
 pub use token::OAuthToken;
+pub use u2m::AuthorizationCodeProvider;

rust/src/auth/oauth/token_store.rs

@@ -67,6 +67,7 @@ impl Drop for RefreshGuard {
 /// # Example
 ///
 /// ```rust,ignore
+/// // This is a private internal module - example shown for documentation only
 /// use databricks_adbc::auth::oauth::token_store::TokenStore;
 /// use databricks_adbc::auth::oauth::token::OAuthToken;
 ///