signer         (boolean, optional, default=false) Use an external signer such as a hardware wallet. Requires -signer to be configured. Wallet creation will fail if keys cannot be fetched. Requires disable_private_keys and descriptors set to true.

Result:
{                       (json object)
  "name" : "str",       (string) The wallet name if created successfully. If the wallet was created using a full path, the wallet_name will be the full path.
  "warning" : "str",    (string, optional) Warning messages,