Step #1 - Deploy your smart contract
Setting the whitelist is only available after the contract is deployed
Step #2 - List of addresses
Prepare your entire list of addresses in a txt file and make sure that you have one address per line and nothing else. Paste the list of address in the "Whitelist" text field and click "Apply".
address1
address2
address3
address4
address5
ect
Step #2 - SDK (optional)
Once the transaction is successful, return to the "Embed mint button" section and copy/paste the new code in your website.