Add discrim verify in PATCH /users/@me

api/src/routes/users/@me/index.ts

@@ -77,6 +77,14 @@ router.patch("/", route({ body: "UserModifySchema" }), async (req: Request, res:
 		}
 	}
 
+	if (body.discriminator) {
+		if (await User.findOne({ where: { discriminator: body.discriminator, username: body.username || user.username } })) {
+			throw FieldErrors({
+				discriminator: { code: "INVALID_DISCRIMINATOR", message: "This discriminator is already in use." }
+			});
+		}
+	}
+
 	user.assign(body);
 	await user.save();