Access Denied when querying ledger through REST API

I've created an API like the one in fabcar for a network of 2 orgs and 1 peer for each org, invoking chaincode and querying ledger worked well through CLI, but when running on localhost:8082, it gives the following error:

when discovery is true:
[DiscoveryService]: send[mychannel] - Channel:mychannel received discovery error:access denied
Failed to evaluate transaction: Error: DiscoveryService: mychannel error: access denied

when discovery is false:
2022-07-13T20:04:17.391Z - error: [Transaction]: Error: No valid responses from any peers. Errors:
Failed to evaluate transaction: Error: No valid responses from any peers.