diff --git a/api/bun.lockb b/api/bun.lockb
index a21aced..e499045 100755
Binary files a/api/bun.lockb and b/api/bun.lockb differ
diff --git a/api/database.sql b/api/database.sql
index 6394258..b2a33af 100644
--- a/api/database.sql
+++ b/api/database.sql
@@ -16,10 +16,5 @@ CREATE TABLE users (
   password VARCHAR(255) NOT NULL,
   score INT UNSIGNED NOT NULL DEFAULT 0,
   PRIMARY KEY (id),
-  CONSTRAINT u_user_type_id
-    FOREIGN KEY (user_type_id)
-    REFERENCES user_types(id)
-    ON DELETE RESTRICT
-    ON UPDATE CASCADE,
-  INDEX ur_user_type_idx (user_type_id)
+  INDEX ur_username_idx (username)
 ) ENGINE=InnoDB;
\ No newline at end of file