diff --git a/notification-server/src/database.rs b/notification-server/src/database.rs
index 97877eae..b5ba5d84 100644
--- a/notification-server/src/database.rs
+++ b/notification-server/src/database.rs
@@ -1,19 +1,17 @@
-use std::{
-    collections::{HashMap, HashSet},
-    vec::IntoIter,
-};
-
+use crate::models::device::{Device, Preference};
 use concordium_rust_sdk::{
     base::hashes::BlockHash, common::types::AccountAddress, types::AbsoluteBlockHeight,
 };
 use deadpool_postgres::{GenericClient, Manager, ManagerConfig, Pool, PoolError, RecyclingMethod};
 use lazy_static::lazy_static;
 use log::error;
+use std::{
+    collections::{HashMap, HashSet},
+    vec::IntoIter,
+};
 use thiserror::Error;
 use tokio_postgres::{error::SqlState, types::ToSql, NoTls};
 
-use crate::models::device::{Device, Preference};
-
 #[derive(Debug, Error)]
 pub enum Error {
     #[error("Unrecoverable connection issue: {0}")]