/// User-related utility functions
////// Resolve user identifier to user ID
/// If the identifier looks like a user ID (starts with "usr_"), return as-is
/// Otherwise, treat it as a display name and resolve to user ID
pubfnresolve_user_identifier(identifier:&str, use_id:bool)->(String, bool){if use_id || identifier.starts_with("usr_"){(identifier.to_string(),true)}else{(identifier.to_string(),false)}}