feat: Inherit authentication from existing client

Allow `ClientBuilder` to create new clients which share the existing
authentication session from another clients.

Author: LeanderBB

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "proton-api-rs"
 authors = ["Leander Beernaert <lbb-dev@pm.me>"]
-version = "0.4.0"
+version = "0.5.0"
 edition = "2021"
 license = "AGPL-3.0-only"
 description = "Unofficial implemention of proton REST API in rust"

src/client/client_builder.rs

@@ -216,6 +216,16 @@ impl ClientBuilder {
         Ok(Client { http_client, user })
     }
 
+    /// Creates a new client which inherits the authentication state from another client.
+    pub fn with_client_auth(self, client: &Client) -> Result<Client, RequestError> {
+        let http_client = self.0.build()?;
+
+        Ok(Client {
+            http_client,
+            user: client.user.clone(),
+        })
+    }
+
     /// Check connectivity
     pub async fn ping(&self) -> Result<(), RequestError> {
         let http_client = self.0.clone().build()?;

src/client/types/auth.rs

@@ -129,7 +129,7 @@ impl<'a> FIDO2Auth<'a> {
 }
 
 #[doc(hidden)]
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct UserAuth {
     pub uid: Secret<UserUid>,
     pub access_token: SecretString,

src/domain/user.rs

@@ -18,6 +18,8 @@ impl secrecy::Zeroize for UserUid {
     }
 }
 
+impl secrecy::CloneableSecret for UserUid {}
+
 impl secrecy::DebugSecret for UserUid {}
 
 impl UserUid {