Solidity, search contract by range by using alchemy API got pending result

Question

async function main() {
  const latestBlock = await alchemy.core.getBlockNumber();
  console.log("The latest block number is", latestBlock);

  const getTransfers = alchemy.core.getAssetTransfers({
    fromBlock: 15944276,
    toBlock: "latest",
    contractAddresses: ["0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d"],
    excludeZeroValue: true,
    category: ["erc721"],
  });
  console.log(getTransfers);
}

Foloing alchemy tutiroal with above code. This is suppose to search a contract by its addrress given a block range.

But from the output I always get this result.

Promise { <pending> }

Seems the call is async that I need to wait for longer? What's the better way to achieve this? Thank you.

Reference: https://docs.alchemy.com/reference/using-the-alchemy-sdk