create user database

driver/database/dbusers.py

@@ -0,0 +1,28 @@
+from typing import Dict, List, Union
+from driver.database.dblocal import db
+
+usersdb = db.users
+
+
+async def is_served_user(user_id: int) -> bool:
+    user = await usersdb.find_one({"user_id": user_id})
+    if not user:
+        return False
+    return True
+
+
+async def get_served_users() -> list:
+    users = usersdb.find({"user_id": {"$gt": 0}})
+    if not users:
+        return []
+    users_list = []
+    for user in await users.to_list(length=1000000000):
+        users_list.append(user)
+    return users_list
+
+
+async def add_served_user(user_id: int):
+    is_served = await is_served_user(user_id)
+    if is_served:
+        return
+    return await usersdb.insert_one({"user_id": user_id})