def init_blueprint(self, blueprint):
        """Initialize a Flask Blueprint, similar to init_app, but without the access
        to the application config.
        Keyword Arguments:
            blueprint {Flask Blueprint} -- Flask Blueprint instance to initialize (Default: {None})
        """
        if self._route is not None:
            raise TypeError("route cannot be set when using blueprints!")

        blueprint.rak = self
        blueprint.add_url_rule("", view_func=getattr(self, self._view_name), methods=['POST'])
Initialize a Flask Blueprint, similar to init_app, but without the access
        to the application config.
        Keyword Arguments:
            blueprint {Flask Blueprint} -- Flask Blueprint instance to initialize (Default: {None})