Function ruma_state_res::event_auth::get_user_power_level

pub fn get_user_power_level<E, F>(user_id: &UserId, fetch_state: F) -> i64 where
    E: Event,
    F: Fn(&EventType, &str) -> Option<Arc<E>>, 

Helper function to fetch a users default power level from a “m.room.power_level” event’s users object.