+
+ var username = ns.getString("username");
+ if (username != null) {
+ try {
+ final var newUsername = m.setUsername(username);
+ if (outputWriter instanceof PlainTextWriter w) {
+ w.println("Your new username: {}", newUsername);
+ } else if (outputWriter instanceof JsonWriter w) {
+ w.write(new JsonAccountResponse(newUsername));
+ }
+ } catch (IOException e) {
+ throw new IOErrorException("Failed to set username: " + e.getMessage(), e);
+ } catch (InvalidUsernameException e) {
+ throw new UserErrorException("Invalid username: " + e.getMessage(), e);
+ }
+ }
+
+ var deleteUsername = Boolean.TRUE.equals(ns.getBoolean("delete-username"));
+ if (deleteUsername) {
+ try {
+ m.deleteUsername();
+ } catch (IOException e) {
+ throw new IOErrorException("Failed to delete username: " + e.getMessage(), e);
+ }
+ }