 "warnings" : [     (json array, optional) Warning messages, if any, related to creating and loading the wallet.
    "str",           (string)
    ...
  ]
}

Examples:
> bitcoin-cli createwallet "testwallet"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "createwallet", "params": ["testwallet"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/
> bitcoin-cli -named createwallet wallet_name=descriptors avoid_reuse=true descriptors=true load_on_startup=true
> curl 