admin: added list of users

crates/database/src/tables/users.rs

@@ -97,6 +97,13 @@ impl Users {
             .map_err(handle_error)
     }
 
+    pub async fn get_all(conn: impl SqliteExecutor<'_>) -> Result<Vec<Self>, Error> {
+        sqlx::query_file_as!(Self, "queries/users/get_all.sql")
+            .fetch_all(conn)
+            .await
+            .map_err(handle_error)
+    }
+
     pub async fn set_username(
         conn: impl SqliteExecutor<'_>,
         id: &str,