Macro define_command 

macro_rules! define_command {
    ($func_key:ident => {
        name: $fn_name:expr,
        matcher: $matcher:expr,
        documentation: $doc:expr,
        implements_signing_capability: $implements_signing_capability:expr,
        implements_background_task_capability: $implements_background_task_capability:expr,
        // todo: add key field and use the input_name as the key, so the user can also provide a web-ui facing name
        inputs: [$($input_name:ident: { documentation: $input_doc:expr, typing: $input_ts:expr, optional: $optional:expr, tainting: $tainting:expr, internal: $internal:expr $(, sensitive: $sensitive:expr)? }),*],
        outputs: [$($output_name:ident: { documentation: $output_doc:expr, typing: $output_ts:expr }),*],
        example: $example:expr,
        $(, implements_cloud_service: $implements_cloud_service:expr)?
    }) => { ... };
}