List App User using External App User ID

- [X ] I have checked that the [SDK documentation][sdk-docs] doesn't solve my issue.
- [ X] I have checked that the [API documentation][api-docs] doesn't solve my issue.
- [X ] I have searched the [Box Developer Forums][dev-forums] and my issue isn't already reported (or if it has been reported, I have attached a link to it, for reference).
- [X ] I have searched [Issues in this repo][github-repo] and my issue isn't already reported.

### Description of the Issue
Reference: [Box Documentation](https://developer.box.com/reference/get-users/#param-external_app_user_id)
The CLI doesn't support getting a Box App User using the param `external_app_user_id` which is documented in the API. This works in the REST call.

`curl --location --request GET 'https://api.box.com/2.0/users?external_app_user_id=' --header 'Authorization: Bearer '
`
### Steps to Reproduce

1. Create app user with an external app user id `box users:create TESTTTTTTT --app-user --external-id "11111"`
2. Query via the curl request using that external app user id `curl --location --request GET 'https://api.box.com/2.0/users?external_app_user_id=11111' --header 'Authorization: Bearer '`

### Expected Behavior
User matching the external_app_user_id will be returned

### Error Message, Including Stack Trace

### Screenshots

### Versions Used
Box CLI: 2.9
Operating System: macOS Big Sure

[sdk-docs]: ./doc
[api-docs]: https://developer.box.com/docs
[dev-forums]: https://community.box.com/t5/Platform-and-Development-Forum/bd-p/DeveloperForum
[github-repo]: https://github.com/box/box-java-sdk/search?type=Issues