Bux fix

Bug: when getting user by id, it would try to parse i16 to i32, type
changed

backend/src/handlers/auth.rs

@@ -220,7 +220,7 @@ pub async fn get_users(
 }
 
 pub async fn get_user_by_id(
-    Path(id): Path<i32>,
+    Path(id): Path<i16>,
     State(data): State<Arc<AppState>>,
 ) -> Result<impl IntoResponse, (StatusCode, Json<serde_json::Value>)> {
     let query = sqlx::query_as::<_, User>(r#"SELECT * FROM users WHERE id = $1"#)