diff --git a/industry_game/handlers/games/lobby/read_lobby.py b/industry_game/handlers/games/lobby/read_lobby.py
index 5c5b585..31c86e9 100644
--- a/industry_game/handlers/games/lobby/read_lobby.py
+++ b/industry_game/handlers/games/lobby/read_lobby.py
@@ -1,4 +1,4 @@
-from aiohttp.web import HTTPNotFound, Response, View
+from aiohttp.web import Response, View
 
 from industry_game.utils.http.auth.base import (
     AuthMixin,
@@ -7,6 +7,7 @@
 from industry_game.utils.http.deps import DependenciesMixin
 from industry_game.utils.http.params import parse_path_param
 from industry_game.utils.http.response import msgspec_json_response
+from industry_game.utils.lobby.models import LobbyStatus, LobbyStatusType
 
 
 class ReadGameUserLobbyHandler(View, DependenciesMixin, AuthMixin):
@@ -14,7 +15,12 @@ class ReadGameUserLobbyHandler(View, DependenciesMixin, AuthMixin):
     async def get(self) -> Response:
         game_id = parse_path_param(self.request, "game_id", int)
 
-        game = await self.game_storage.read_by_id(game_id=game_id)
-        if game is None:
-            raise HTTPNotFound
-        return msgspec_json_response(game)
+        lobby = await self.lobby_storage.read_by_id(
+            game_id=game_id,
+            user_id=self.user.id,
+        )
+        if lobby is None:
+            status = LobbyStatusType.NOT_CHECKED_IN
+        else:
+            status = LobbyStatusType.CHECKED_IN
+        return msgspec_json_response(LobbyStatus(status=status))
diff --git a/industry_game/utils/lobby/models.py b/industry_game/utils/lobby/models.py
index 892647c..6935446 100644
--- a/industry_game/utils/lobby/models.py
+++ b/industry_game/utils/lobby/models.py
@@ -1,3 +1,5 @@
+from enum import StrEnum, unique
+
 import msgspec
 
 from industry_game.db.models import UserGameLobby as UserGameLobbyDb
@@ -20,3 +22,13 @@ def from_model(cls, obj: UserGameLobbyDb) -> "Lobby":
 class LobbyPagination(msgspec.Struct, frozen=True):
     meta: MetaPagination
     items: list[ShortUser]
+
+
+@unique
+class LobbyStatusType(StrEnum):
+    CHECKED_IN = "CHECKED_IN"
+    NOT_CHECKED_IN = "NOT_CHECKED_IN"
+
+
+class LobbyStatus(msgspec.Struct, frozen=True):
+    status: StrEnum
diff --git a/industry_game/utils/users/storage.py b/industry_game/utils/users/storage.py
index 8d42e6d..4b5e9ec 100644
--- a/industry_game/utils/users/storage.py
+++ b/industry_game/utils/users/storage.py
@@ -53,10 +53,7 @@ async def read_by_username(
         session: AsyncSession,
         username: str,
     ) -> FullUser | None:
-        stmt = select(UserDb).where(
-            UserDb.type == UserType.PLAYER,
-            UserDb.username == username,
-        )
+        stmt = select(UserDb).where(UserDb.username == username)
         obj = (await session.scalars(stmt)).first()
         return FullUser.from_model(obj) if obj else None
 
diff --git a/tests/api/players/test_player_register.py b/tests/api/players/test_player_register.py
index 0ea9d18..4a53d8b 100644
--- a/tests/api/players/test_player_register.py
+++ b/tests/api/players/test_player_register.py
@@ -1,3 +1,6 @@
+from http import HTTPStatus
+
+import pytest
 from aiohttp.test_utils import TestClient
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -21,7 +24,7 @@ async def test_player_register_successful_status_created(
             "name": "your name",
         },
     )
-    assert response.status == 201
+    assert response.status == HTTPStatus.CREATED
 
 
 async def test_player_register_successful_check_db(
@@ -43,3 +46,21 @@ async def test_player_register_successful_check_db(
 
     assert user.username == "username"
     assert user.type == UserType.PLAYER
+
+
+@pytest.mark.parametrize("user_type", (UserType.ADMIN, UserType.PLAYER))
+async def test_player_register_same_username_error_conflict(
+    api_client: TestClient, create_user, user_type
+):
+    user = await create_user(type=user_type)
+
+    response = await api_client.post(
+        API_URL,
+        json={
+            "username": user.username,
+            "password": "password",
+            "telegram": "telegram",
+            "name": "your name",
+        },
+    )
+    assert response.status == HTTPStatus.BAD_REQUEST