Better instructions to withdraw attestation service fees

[arthurgousset]

Reflecting a question from @mbay2002 | VCAP on Discord to continue the conversation and for future reference:

@0xArthur.xyz | cLabs Docs at https://docs.celo.org/validator-guide/attestation-service state

Validators receive a fee (set by on-chain governance, currently 0.05 cUSD) for every attestation that they process and that is then successfully redeemed on-chain by the user. In a future release, validators will be able claim and withdraw this fee.

Any idea when we will be able to claim/withdraw these fees?

@eelanagaraj kindly responded:

Hey @mbay2002 | VCAP from what I can tell, the docs are out of date on this 🤔 there already exists functionality in Attestations.sol and ContractKit to do this, via the withdraw function. You should be able to call this function from an issuer's attestation signer, which will transfer available fees in the specified token to the issuer account.