How to specify one chainId?

[lenzfliker]

I tried all of these ways to get only Polygon Mumbai net but no luck

1:
const alchemyId = process.env.ALCHEMY_ID;
const chains = defaultL2Chains;
const defaultL2Chain = chain.polygonMumbai;

const client = createClient({
  autoConnect: true,
  connectors({ chainId }): 80001{ //👈
    const chain = chains.find((x) => x.id === chainId) ?? defaultL2Chain;
    const rpcUrl = chain.rpcUrls.alchemy
      ? `${chain.rpcUrls.alchemy}/${alchemyId}`
      : chain.rpcUrls.default;
    return [new MetaMaskConnector({ chains })];
  },
});

---

2:
const alchemyId = process.env.ALCHEMY_ID;
const chains = defaultL2Chains;
const defaultL2Chain = chain.polygonMumbai;

const client = createClient({
  autoConnect: true,
  connectors({ chainId:80001 }){ //👈
    const chain = chains.find((x) => x.id === chainId) ?? defaultL2Chain;
    const rpcUrl = chain.rpcUrls.alchemy
      ? `${chain.rpcUrls.alchemy}/${alchemyId}`
      : chain.rpcUrls.default;
    return [new MetaMaskConnector({ chains })];
  },
});

---

3:
const alchemyId = process.env.ALCHEMY_ID;
const chains = defaultL2Chains;
const defaultL2Chain = chain.polygonMumbai;

const client = createClient({
  autoConnect: true,
  connectors({ chainId }){
    const chain = chains.find((x) => x.id === 80001) ?? defaultL2Chain; //👈
    const rpcUrl = chain.rpcUrls.alchemy
      ? `${chain.rpcUrls.alchemy}/${alchemyId}`
      : chain.rpcUrls.default;
    return [new MetaMaskConnector({ chains })];
  },
});```