[BUG][Python] init access token for python client configuration (#7469)

* fix: init access token for python client configuration

* fix: remove duplicate initializations for access_token

Author: zilvinasu

.generator/templates/configuration.mustache

@@ -163,6 +163,7 @@ conf = {{{packageName}}}.Configuration(
 
     def __init__(self, host=None,
                  api_key=None, api_key_prefix=None,
+                 access_token=None,
                  username=None, password=None,
                  discard_unknown_keys=False,
                  disabled_client_side_validations="",
@@ -190,6 +191,7 @@ conf = {{{packageName}}}.Configuration(
         """Temp file folder for downloading files
         """
         # Authentication Settings
+        self.access_token = access_token
         self.api_key = {}
         if api_key:
             self.api_key = api_key
@@ -218,18 +220,6 @@ conf = {{{packageName}}}.Configuration(
         """The HTTP signing configuration
         """
 {{/hasHttpSignatureMethods}}
-{{#hasOAuthMethods}}
-        self.access_token = None
-        """access token for OAuth/Bearer
-        """
-{{/hasOAuthMethods}}
-{{^hasOAuthMethods}}
-{{#hasBearerMethods}}
-        self.access_token = None
-        """access token for OAuth/Bearer
-        """
-{{/hasBearerMethods}}
-{{/hasOAuthMethods}}
         self.logger = {}
         """Logging Settings
         """