There's no reason for Registration::complete to take an owned string

README.md

@@ -68,7 +68,7 @@ fn register() -> Result<Mastodon, Box<Error>> {
     io::stdin().read_line(&mut input)?;
 
     let code = input.trim().to_string();
-    let mastodon = registration.complete(code)?;
+    let mastodon = registration.complete(&code)?;
 
     // Save app data for using on the next run.
     toml::to_file(&*mastodon, "mastodon-data.toml")?;

examples/register.rs

@@ -39,7 +39,7 @@ pub fn register() -> Result<Mastodon, Box<Error>> {
     println!("Click this link to authorize on Mastodon: {}", url);
     let code = read_line("Paste the returned authorization code: ")?;
 
-    let mastodon = registration.complete(code)?;
+    let mastodon = registration.complete(&code)?;
 
     // Save app data for using on the next run.
     toml::to_file(&*mastodon, "mastodon-data.toml")?;

src/lib.rs

@@ -18,7 +18,7 @@
 //! // Here you now need to open the url in the browser
 //! // And handle a the redirect url coming back with the code.
 //! let code = String::from("RETURNED_FROM_BROWSER");
-//! let mastodon = registration.complete(code)?;
+//! let mastodon = registration.complete(&code)?;
 //!
 //! println!("{:?}", mastodon.get_home_timeline()?.initial_items);
 //! # Ok(())

src/registration.rs

@@ -103,7 +103,7 @@ impl<'a, H: HttpSend> Registration<'a, H> {
     /// // Here you now need to open the url in the browser
     /// // And handle a the redirect url coming back with the code.
     /// let code = String::from("RETURNED_FROM_BROWSER");
-    /// let mastodon = registration.complete(code)?;
+    /// let mastodon = registration.complete(&code)?;
     ///
     /// println!("{:?}", mastodon.get_home_timeline()?.initial_items);
     /// # Ok(())
@@ -144,7 +144,7 @@ impl<H: HttpSend> Registered<H> {
 
     /// Create an access token from the client id, client secret, and code
     /// provided by the authorisation url.
-    pub fn complete(self, code: String) -> Result<Mastodon<H>> {
+    pub fn complete(self, code: &str) -> Result<Mastodon<H>> {
         let url = format!(
             "{}/oauth/token?client_id={}&client_secret={}&code={}&grant_type=authorization_code&redirect_uri={}",
             self.base,