Use Ruma-provided default power levels for shorter code

src/client_server/account.rs

@@ -286,18 +286,8 @@ pub async fn register_route(
                 event_type: EventType::RoomPowerLevels,
                 content: serde_json::to_value(
                     ruma::events::room::power_levels::PowerLevelsEventContent {
-                        ban: 50.into(),
-                        events: BTreeMap::new(),
-                        events_default: 0.into(),
-                        invite: 50.into(),
-                        kick: 50.into(),
-                        redact: 50.into(),
-                        state_default: 50.into(),
                         users,
-                        users_default: 0.into(),
-                        notifications: ruma::power_levels::NotificationPowerLevels {
-                            room: 50.into(),
-                        },
+                        ..Default::default()
                     },
                 )
                 .expect("event is valid, we just created it"),

src/client_server/room.rs

@@ -113,16 +113,8 @@ pub async fn create_room_route(
 
     let mut power_levels_content =
         serde_json::to_value(ruma::events::room::power_levels::PowerLevelsEventContent {
-            ban: 50.into(),
-            events: BTreeMap::new(),
-            events_default: 0.into(),
-            invite: 50.into(),
-            kick: 50.into(),
-            redact: 50.into(),
-            state_default: 50.into(),
             users,
-            users_default: 0.into(),
-            notifications: ruma::power_levels::NotificationPowerLevels { room: 50.into() },
+            ..Default::default()
         })
         .expect("event is valid, we just created it");