allow the postgres use

src/bin/main.rs

@@ -6,6 +6,7 @@ use elseware::login::login::LoginServerState;
 use elseware::login::character::CharacterServerState;
 use elseware::ship::ship::ShipServerStateBuilder;
 use elseware::entity::account::{NewUserAccountEntity, NewUserSettingsEntity};
+#[allow(unused_imports)]
 use elseware::entity::gateway::{EntityGateway, InMemoryGateway, PostgresGateway};
 use elseware::entity::character::NewCharacterEntity;
 use elseware::entity::item::{NewItemEntity, ItemDetail, ItemLocation};