Run clippy fixes

server/src/model/session.rs

@@ -19,13 +19,13 @@ impl Session {
         let created_at = Utc::now();
         let expires_at = Utc::now() + Duration::days(7);
 
-        return Self {
+        Self {
             session_id,
             user_id,
             token,
             expires_at,
             created_at,
-        };
+        }
     }
 }