Function add_nodes_to_group 

pub async fn add_nodes_to_group(
    ctx: RequestCtx,
    note: AuditNote,
    __arg2: Path<String>,
    __arg3: Json<AddNodesToGroupRequest>,
) -> Result<impl IntoResponse, (StatusCode, Json<ErrorResponse>)>

POST /groups/{name}/members — replace a group’s member list from a host expression.