docs: add more comments for fields

sdgb-api/src/title/model/get_user_data_api/mod.rs

@@ -98,21 +98,35 @@ pub struct UserData {
     pub last_trial_play_date: String,
     pub last_play_credit: i64,
     pub last_play_mode: i64,
+
+    /// 上次游玩位置 ID
     pub last_place_id: i64,
+    /// 上次游玩位置
+    pub last_place_name: Option<String>,
+
     pub last_all_net_id: i64,
+    /// 上次游玩地区 ID
     pub last_region_id: i64,
+    /// 上次游玩地区
     pub last_region_name: String,
     pub last_country_code: String,
     #[serde(rename = "lastSelectEMoney")]
     pub last_select_emoney: i64,
+    /// 上次功能票
     pub last_select_ticket: i64,
+    /// 上次挑战段位
     pub last_select_course: i64,
+    /// 上次段位计数
     pub last_count_course: i64,
     pub first_game_id: String,
+    /// 首次游玩游戏版本
     pub first_rom_version: String,
+    /// 首次游玩数据版本
     pub first_data_version: String,
+    /// 首次游玩
     pub first_play_date: String,
     pub compatible_cm_version: String,
+    /// 总觉醒数
     pub total_awake: i64,
     pub daily_bonus_date: String,
     pub daily_course_bonus_date: String,
@@ -121,11 +135,15 @@ pub struct UserData {
     pub friend_regist_skip: i64,
     pub cm_last_emoney_credit: i64,
     pub cm_last_emoney_brand: i64,
-    // below are some null field
-    // pub access_code: Value,
-    // pub friend_code: Value,
-    // pub last_game_id: Value,
-    // pub last_place_name: Value,
-    // pub last_client_id: Value,
-    // pub date_time: Value,
+    
+    /// 访问密码（国区无）
+    pub access_code: Option<String>,
+    /// 好友代码（国区无）
+    pub friend_code: Option<u32>,
+    /// 上次游玩 ID
+    pub last_game_id: Option<u32>,
+    /// 上次登入狗号
+    pub last_client_id: Option<String>,
+    /// 时间戳
+    pub date_time: Option<u64>,
 }