Proper user authentication

migrations/20260714035817_create_table_users.sql

@@ -1,6 +1,6 @@
 CREATE TABLE IF NOT EXISTS users (
     id uuid DEFAULT gen_random_uuid() PRIMARY KEY,
     steamid char(64) NOT NULL,
-    name varchar(5) NOT NULL,
-    avatar varchar(20) NOT NULL
+    name varchar NOT NULL,
+    avatar varchar NOT NULL
 );