<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def extract_presets(app_config):
 """ Pull the application's configurations for Sanic JWT """

        return {
            x.lower()[10:]: app_config.get(x)
            for x in filter(lambda x: x.startswith("SANIC_JWT"), app_config)
        }