core: allow username change with cli (#177)

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.32.32",
+    "version": "2.32.33",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/model/user.ts

@@ -210,6 +210,11 @@ class UserModel {
         return res;
     }
 
+    @ArgMethod
+    static setUname(uid: number, uname: string) {
+        return UserModel.setById(uid, { uname, unameLower: uname.trim().toLowerCase() });
+    }
+
     @ArgMethod
     static setEmail(uid: number, mail: string) {
         return UserModel.setById(uid, { mail, mailLower: mail.trim().toLowerCase() });