def init_app(self, app):
self.app = app<EOL>self._session_conf = app.config.get('<STR_LIT>', {<EOL>'<STR_LIT>': '<STR_LIT:file>',<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>'<EOL>})<EOL>app.wsgi_app = SessionMiddleware(app.wsgi_app, self._session_conf)<EOL>app.session_interface = BeakerSessionInterface()<EOL>
Initalizes the application with the extension.

        :param app: The Flask application object.