Fix clippy errors

src/configuration.rs

@@ -40,7 +40,7 @@ impl DatabaseSettings {
         PgConnectOptions::new()
             .host(&self.host)
             .username(&self.username)
-            .password(&self.password.expose_secret())
+            .password(self.password.expose_secret())
             .port(self.port)
             .ssl_mode(ssl_mode)
     }

src/domain/subscriber_name.rs

@@ -72,7 +72,7 @@ mod tests {
 
     #[test]
     fn names_containing_an_invalid_character_are_rejected() {
-        for name in vec!['/', '(', ')', '"', '<', '>', '\\', '{', '}'] {
+        for name in &['/', '(', ')', '"', '<', '>', '\\', '{', '}'] {
             let name = name.to_string();
             assert_err!(SubscriberName::parse(name));
         }