Check whether a single username belongs to a Telegram user

Looks up the username via `client$get_entity()`. Channels and group chats produce an `error` row — this helper is for user accounts only.

Usage

check_username_on_telegram(
  client,
  username,
  download_profile_photo = FALSE,
  photo_dir = NULL
)

Arguments

client

An authenticated [TelegramClient] instance.

username

Username, with or without a leading `@`.

download_profile_photo, photo_dir

See [check_phone_on_telegram()].

Value

A named list with the user's public fields, or a list with an `error` field.

See also

[check_usernames_on_telegram()] for batch lookups.