core: allow login by email

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.39.6",
+    "version": "2.39.7",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/user.ts

@@ -77,7 +77,8 @@ class UserLoginHandler extends Handler {
     @param('redirect', Types.String, true)
     async post(domainId: string, uname: string, password: string, rememberme = false, redirect = '') {
         if (!system.get('server.login')) throw new LoginError('Builtin login disabled.');
-        const udoc = await user.getByUname(domainId, uname);
+        let udoc = await user.getByEmail(domainId, uname);
+        if (!udoc) udoc = await user.getByUname(domainId, uname);
         if (!udoc) throw new UserNotFoundError(uname);
         udoc.checkPassword(password);
         await user.setById(udoc._id, { loginat: new Date(), loginip: this.request.ip });