hash password

migrations/20240423082838_user_table.sql

@@ -1,8 +1,8 @@
 CREATE TABLE IF NOT EXISTS user (
     `id` INTEGER PRIMARY KEY AUTOINCREMENT,
     `avatar` VARCHAR,
-    `username` VARCHAR UNIQUE,
-    `password` VARCHAR,
+    `username` VARCHAR UNIQUE NOT NULL,
+    `password_hash` VARCHAR NOT NULL,
     `last_seen` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
     `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
 );