```sh
# Add a member with Identifier I6c20e814b56579306f55c64e8747e6c1b4a53d9a3f4ca83c252cc2fbfc72fa94
# who can create any relay (wildcard) and a custom key=value attribute that can be used by Attribute-based Access Control
$ ockam project-member add I6c20e814b56579306f55c64e8747e6c1b4a53d9a3f4ca83c252cc2fbfc72fa94 --relay="*" --attribute key=value
```