async def post(self,body: Call, request_configuration: Optional[RequestConfiguration[QueryParameters]] = None) -> Optional[Call]:
        """
        Create call enables your bot to create a new outgoing peer-to-peer or group call, or join an existing meeting. You need to register the calling bot and go through the list of permissions needed. This API supports the following PSTN scenarios:
        param body: The request body
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[Call]
        Find more info here: https://learn.microsoft.com/graph/api/application-post-calls?view=graph-rest-1.0
        """
        if body is None:
            raise TypeError("body cannot be null.")
        request_info = self.to_post_request_information(
            body, request_configuration
        )
        from ...models.o_data_errors.o_data_error import ODataError

        error_mapping: dict[str, type[ParsableFactory]] = {
            "XXX": ODataError,
        }
        if not self.request_adapter:
            raise Exception("Http core is null") 
        from ...models.call import Call

        return await self.request_adapter.send_async(request_info, Call, error_mapping)

        Create call enables your bot to create a new outgoing peer-to-peer or group call, or join an existing meeting. You need to register the calling bot and go through the list of permissions needed. This API supports the following PSTN scenarios:
        param body: The request body
        param request_configuration: Configuration for the request such as headers, query parameters, and middleware options.
        Returns: Optional[Call]
        Find more info here: https://learn.microsoft.com/graph/api/application-post-calls?view=graph-rest-1.0
        
msgraph/generated/communications/calls/calls_request_builder.py