diff --git a/sinch/core/adapters/asyncio_http_adapter.py b/sinch/core/adapters/asyncio_http_adapter.py
index 7c12d151..a34d6613 100644
--- a/sinch/core/adapters/asyncio_http_adapter.py
+++ b/sinch/core/adapters/asyncio_http_adapter.py
@@ -3,10 +3,11 @@
 from sinch.core.ports.http_transport import AsyncHTTPTransport, HttpRequest
 from sinch.core.endpoint import HTTPEndpoint
 from sinch.core.models.http_response import HTTPResponse
+from sinch.core.models.base_model import SinchBaseModel
 
 
 class HTTPTransportAioHTTP(AsyncHTTPTransport):
-    async def request(self, endpoint: HTTPEndpoint) -> HTTPResponse:
+    async def request(self, endpoint: HTTPEndpoint) -> SinchBaseModel:
         request_data: HttpRequest = self.prepare_request(endpoint)
         request_data_with_auth: HttpRequest = await self.authenticate(endpoint, request_data)
 
diff --git a/sinch/core/ports/http_transport.py b/sinch/core/ports/http_transport.py
index 27be9fc2..a3358675 100644
--- a/sinch/core/ports/http_transport.py
+++ b/sinch/core/ports/http_transport.py
@@ -1,6 +1,6 @@
 import aiohttp
 from abc import ABC, abstractmethod
-from typing import TYPE_CHECKING
+from typing import Optional, TYPE_CHECKING, Union, Any, Coroutine
 from sinch.core.endpoint import HTTPEndpoint
 from sinch.core.models.http_request import HttpRequest
 from sinch.core.models.http_response import HTTPResponse
@@ -17,7 +17,7 @@ def __init__(self, sinch: 'ClientBase'):
         self.sinch = sinch
 
     @abstractmethod
-    def request(self, endpoint: HTTPEndpoint) -> SinchBaseModel:
+    def request(self, endpoint: HTTPEndpoint) -> Union[SinchBaseModel, Coroutine[Any, Any, SinchBaseModel]]:
         pass
 
     def authenticate(self, endpoint: HTTPEndpoint, request_data: HttpRequest) -> HttpRequest:
@@ -74,7 +74,7 @@ async def authenticate(self, endpoint: HTTPEndpoint, request_data: HttpRequest)
 
         return request_data
 
-    async def handle_response(self, endpoint: HTTPEndpoint, http_response: HTTPResponse) -> HTTPResponse:
+    async def handle_response(self, endpoint: HTTPEndpoint, http_response: HTTPResponse) -> SinchBaseModel:
         if http_response.status_code == 401:
             self.sinch.configuration.token_manager.handle_invalid_token(http_response)
             if self.sinch.configuration.token_manager.token_state == TokenState.EXPIRED:
diff --git a/sinch/core/token_manager.py b/sinch/core/token_manager.py
index df28b56c..4cbc7098 100644
--- a/sinch/core/token_manager.py
+++ b/sinch/core/token_manager.py
@@ -1,6 +1,6 @@
 from enum import Enum
 from abc import ABC, abstractmethod
-from typing import Optional, TYPE_CHECKING, Union, Any
+from typing import Optional, TYPE_CHECKING, Union, Any, Coroutine
 
 from sinch.domains.authentication.models.authentication import OAuthToken
 from sinch.domains.authentication.endpoints.oauth import OAuthEndpoint
@@ -24,7 +24,7 @@ def __init__(self, sinch: 'ClientBase') -> None:
         self.token_state = TokenState.INVALID
 
     @abstractmethod
-    def get_auth_token(self) -> Optional[OAuthToken]:
+    def get_auth_token(self) -> Union[Optional[OAuthToken], Coroutine[Any, Any, Optional[OAuthToken]]]:
         pass
 
     def invalidate_expired_token(self) -> None: