chore: replace 'token' with power

database/update-v3.2.8.sql

@@ -0,0 +1,23 @@
+-- 删除用户名重复的用户，只保留一条
+DELETE FROM chatgpt_users
+WHERE username IN (
+    SELECT username
+    FROM (
+             SELECT username
+             FROM chatgpt_users
+             GROUP BY username
+             HAVING COUNT(*) > 1
+         ) AS temp
+) AND id NOT IN (
+    SELECT MIN(id)
+    FROM (
+             SELECT id, username
+             FROM chatgpt_users
+             GROUP BY id, username
+             HAVING COUNT(*) > 1
+         ) AS temp
+    GROUP BY username
+);
+
+-- 给 username 字段建立唯一索引
+ALTER TABLE `chatgpt_users` ADD UNIQUE(`username`)