Fix issue for some fields

There is some requirement different fields between CLI and WebUI.

After I added optional to some fields, the issue should be resolved.

For example,

the engine_id can be 0 to 32, however, if it is set to 0, then it will throw exception of data cannot be empty, so we should add it to optional attribute.

besides,

in CLI, the field auth_protocol is not required (not mandatory), so I added optional attribute to this field to resolve the issue.