How to use the algosdk.NaclWrapper.sign function in algosdk

throw new Error(`invalid seed: ${seed}`);
    }
    if (typeof seed === 'string') {
      try {
        seed = Seed.decode(seed).seed;
      } catch (e) {
        throw new Error(`could not decode seed: ${seed}`);
      }
    }
    const keyPair = generateAccountFromSeed(seed);

    if (!Buffer.isBuffer(message)) {
      message = Buffer.from(message);
    }

    return Buffer.from(NaclWrapper.sign(message, keyPair.sk));
  }