def by_identity_user_flow_attribute_assignment_id(self,identity_user_flow_attribute_assignment_id: str) -> IdentityUserFlowAttributeAssignmentItemRequestBuilder:
        """
        Provides operations to manage the userAttributeAssignments property of the microsoft.graph.b2xIdentityUserFlow entity.
        param identity_user_flow_attribute_assignment_id: The unique identifier of identityUserFlowAttributeAssignment
        Returns: IdentityUserFlowAttributeAssignmentItemRequestBuilder
        """
        if identity_user_flow_attribute_assignment_id is None:
            raise TypeError("identity_user_flow_attribute_assignment_id cannot be null.")
        from .item.identity_user_flow_attribute_assignment_item_request_builder import IdentityUserFlowAttributeAssignmentItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["identityUserFlowAttributeAssignment%2Did"] = identity_user_flow_attribute_assignment_id
        return IdentityUserFlowAttributeAssignmentItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the userAttributeAssignments property of the microsoft.graph.b2xIdentityUserFlow entity.
        param identity_user_flow_attribute_assignment_id: The unique identifier of identityUserFlowAttributeAssignment
        Returns: IdentityUserFlowAttributeAssignmentItemRequestBuilder
        
msgraph/generated/identity/b2x_user_flows/item/user_attribute_assignments/user_attribute_assignments_request_builder.py