Only whitelisted users can list NFTs, contrary to README

Description

According to the README:

Actors:

1. Owner

• deploy the smart contract and set parameters (collateral, collection name, image, symbol, etc.)

• whitelist or remove from whitelist wallets

• reveal the protocol

• withdraw fees

1. Whitelisted user/wallet

• mint NFT

• buy, update price, cancel listing, list NFT

• collect USDC after selling

1. Non whitelisted user/wallet

• cannot mint

• buy, update price, cancel listing, list NFT

• collect USDC after selling

However, in the code:

So only whitelisted users can list NFTs.

Risk

Impact:

• Code and docs are inconsistent

Recommended Mitigation

Open up the listfunction to all users.