UserResolver register's error handler doesn't work properly. (err code 23505)

[tmelent]

Hello. In user.ts (user resolver) register function is catching and handling error with code 23505:

try {
      ...
    } catch (err) {
      //|| err.detail.includes("already exists")) {
      // duplicate username error
      if (err.code === "23505") {
        return {
          errors: [
            {
              field: "username",
              message: "username already taken",
            },
          ],
        };
      }
    }

But if you try to enter an e-mail that already exists in DB, it sends the same err code (23505) and detail field is similar to username error. key "(email)=asd@asd.com" already exists.
So I think it's correct to check if it includes 'email' or 'username' in it.

if (err.code === "23505") {
        if (err.detail.includes("email")){
          return {
            errors: [
              {
                field: "email",
                message: "email already taken",
              },
            ],
          };
        }
        return {
          errors: [
            {
              field: "username",
              message: "username already taken",
            },
          ],
        };