diff --git a/.env.example b/.env.example
index a0dfd51..0e0f843 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,4 @@
+# Please remove the option that is blank
 HOMESERVER="https://matrix.xxxxxx.xxxx" # required
 USER_ID="@lullap:xxxxxxxxxxxxx.xxx" # required
 PASSWORD="xxxxxxxxxxxxxxx" # required
diff --git a/README.md b/README.md
index eb827f0..6a09527 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,10 @@
 This is a simple Matrix bot that uses OpenAI's GPT API and Bing AI to generate responses to user inputs. The bot responds to four types of prompts: `!gpt`, `!chat` and `!bing` and `!pic` depending on the first word of the prompt.
 ![demo](https://i.imgur.com/kK4rnPf.jpeg "demo")
 
-## Roadmap
-1. Support reading config from environment variables
-2. <del>Solve sync token persist problem when using access_token to login</del> Done!
-3. <del>Support e2e session</del> Done!
+## Feature
+1. Support openai and Bing AI
+2. Support Bing Image Creator
+3. Support E2E Encrypted Room
 
 ## Installation and Setup
 Docker method(Recommended):<br>
@@ -18,9 +18,12 @@ sudo docker compose up -d
 <hr>
 
 To run this application, follow the steps below:<br>
-1. Clone the repository:
+1. Clone the repository and create virtual environment:
 ```
 git clone https://github.com/hibobmaster/matrix_chatgpt_bot.git
+
+python -m venv venv
+source venv/bin/activate
 ```
 2. Install the required dependencies:<br>
 ```
diff --git a/bot.py b/bot.py
index d457c65..34092c4 100644
--- a/bot.py
+++ b/bot.py
@@ -527,14 +527,18 @@ class Bot:
 
     # bot login
     async def login(self) -> None:
-        try:
-            resp = await self.client.login(password=self.password)
-            if not isinstance(resp, LoginResponse):
-                logger.error("Login Failed")
-                print(f"Login Failed: {resp}")
-                sys.exit(1)
-        except Exception as e:
-            logger.error(f"Error: {e}", exc_info=True)
+        if self.access_token is not None:
+            logger.info("Login via access_token")
+        else:
+            logger.info("Login via password")
+            try:
+                resp = await self.client.login(password=self.password)
+                if not isinstance(resp, LoginResponse):
+                    logger.error("Login Failed")
+                    print(f"Login Failed: {resp}")
+                    sys.exit(1)
+            except Exception as e:
+                logger.error(f"Error: {e}", exc_info=True)
 
     # sync messages in the room
     async def sync_forever(self, timeout=30000, full_state=True) -> None:
diff --git a/main.py b/main.py
index 639c4d9..0184324 100644
--- a/main.py
+++ b/main.py
@@ -8,23 +8,36 @@ logger = getlogger()
 
 async def main():
     
-    fp = open('config.json', 'r', encoding="utf8")
-    config = json.load(fp)
-    
-    matrix_bot = Bot(homeserver=config.get('homeserver'),
-                     user_id=config.get('user_id') ,
-                     password=config.get('password'),
-                     device_id=config.get('device_id'),
-                     room_id=config.get('room_id'),
-                     api_key=config.get('api_key'),
-                     bing_api_endpoint=config.get('bing_api_endpoint'),
-                     access_token=config.get('access_token'),
-                     jailbreakEnabled=config.get('jailbreakEnabled'),
-                     bing_auth_cookie=config.get('bing_auth_cookie'),
-                     )                     
+    if os.path.exists('config.json'):
+        fp = open('config.json', 'r', encoding="utf8")
+        config = json.load(fp)
+        
+        matrix_bot = Bot(homeserver=config.get('homeserver'),
+                        user_id=config.get('user_id') ,
+                        password=config.get('password'),
+                        device_id=config.get('device_id'),
+                        room_id=config.get('room_id'),
+                        api_key=config.get('api_key'),
+                        bing_api_endpoint=config.get('bing_api_endpoint'),
+                        access_token=config.get('access_token'),
+                        jailbreakEnabled=config.get('jailbreakEnabled'),
+                        bing_auth_cookie=config.get('bing_auth_cookie'),
+                        )                     
+
+    else:
+        matrix_bot = Bot(homeserver=os.environ.get('HOMESERVER'),
+                        user_id=os.environ.get('USER_ID') ,
+                        password=os.environ.get('PASSWORD'),
+                        device_id=os.environ.get("DEVICE_ID"),
+                        room_id=os.environ.get("ROOM_ID"),
+                        api_key=os.environ.get("OPENAI_API_KEY"),
+                        bing_api_endpoint=os.environ.get("BING_API_ENDPOINT"),
+                        access_token=os.environ.get("ACCESS_TOKEN"),
+                        jailbreakEnabled=os.environ.get("JAILBREAKENABLED"),
+                        bing_auth_cookie=os.environ.get("BING_AUTH_COOKIE"),
+                        )     
 
     await matrix_bot.login()
-
     await matrix_bot.sync_encryption_key()
 
     # await matrix_bot.trust_own_devices()
@@ -33,7 +46,7 @@ async def main():
 
 
 if __name__ == "__main__":
-    print("matrix chatgpt bot start.....")
+    logger.info("matrix chatgpt bot start.....")
     asyncio.run(main())