Allow Connection only to rinkeby and local 8545

[Hussainzz]

How can i achieve to allow connection to just rinkeby and my local chains ?

(connector: Connector) => Promise<{
  data?: {
    account?: string
    chain?: { id: number; unsupported: boolean }
    provider?: Provider
  }
  error?: Error
}>

can someone explain me what is that unsupported value used for ?

[tmm]

You can’t completely restrict the chain a wallet is connected to (since wallets can choose whatever chain they want), but you can set supported chains for connectors. When someone connects or uses a chain that is not specified, unsupported is set to true. You can use this value to restrict access or notify the user to switch chains (useNetwork can help with this).

[Hussainzz]

Sorry for the dumb question, can you brief me on difference between a connector and a provider.
do to restrict certain networks do i also need to pass the connectors prop?
why is getDefaultProvider used

const provider = providers.getDefaultProvider("http://127.0.0.1:8545",{
  infura: 'someKey',
  alchemy: 'someKey'
});

 <WagmiProvider provider={provider}>
 <WagmiProvider />