diff --git a/vkmax/client.py b/vkmax/client.py
index 9834ace..6f9ee16 100644
--- a/vkmax/client.py
+++ b/vkmax/client.py
@@ -216,6 +216,35 @@ async def sign_in(self, sms_token: str, sms_code: int):
             }
         )
 
+        if "error" in verification_response["payload"]:
+            raise Exception(verification_response["payload"]["error"])
+
+        if "passwordChallenge" in verification_response["payload"]:
+            # TODO: smh indicate that 2fa required
+            return verification_response
+
+        try:
+            phone = verification_response["payload"]["profile"]["contact"]["phone"]
+        except:
+            phone = '[?]'
+            _logger.warning('Got no phone number in server response')
+        _logger.info(f'Successfully logged in as {phone}')
+
+        self._is_logged_in = True
+        await self._start_keepalive_task()
+
+        return verification_response
+
+    @ensure_connected
+    async def continue_2fa(self, track_id: str, password: str):
+        verification_response = await self.invoke_method(
+            opcode=115,
+            payload={
+                "trackId": track_id,
+                "password": password
+            }
+        )
+
         if "error" in verification_response["payload"]:
             raise Exception(verification_response["payload"]["error"])
 
@@ -263,6 +292,10 @@ async def login_by_token(self, token: str, device_id: Optional[str] = None):
 
         return login_response
 
+    @ensure_connected
+    async def logout(self):
+        await self.invoke_method(opcode=20)
+
     @property
     def device_id(self) -> Optional[str]:
         return self._device_id