Replace AccessToken with TokenCredential in docstrings

Author: samwelkanda

msgraphcore/client_factory.py

@@ -43,8 +43,8 @@ def __init__(self, **kwargs):
     def create_with_default_middleware(self, credential: TokenCredential, **kwargs) -> Session:
         """Applies the default middleware chain to the HTTP Client
 
-        :param credential: Accesstoken used to access the Graph API. Created through one of the
-            credential classes from `azure.identity`
+        :param credential: TokenCredential used to acquire an access token for the Microsoft
+            Graph API. Created through one of the credential classes from `azure.identity`
         """
         middleware = [
             AuthorizationHandler(credential, **kwargs),

msgraphcore/graph_client.py

@@ -11,8 +11,8 @@
 class GraphClient:
     """Constructs a custom HTTPClient to be used for requests against Microsoft Graph
 
-    :keyword credential: Accesstoken used to access the Graph API. Created through one of the
-        credential classes from `azure.identity`
+    :keyword credential: TokenCredential used to acquire an access token for the Microsoft
+        Graph API. Created through one of the credential classes from `azure.identity`
     :keyword list middleware: Custom middleware(HTTPAdapter) list that will be used to create
         a middleware pipeline. The middleware should be arranged in the order in which they will
         modify the request.