You can do this in setting, you need to check by yourself, just exit program if .message.from.id not equal to yours. You can disable join group via /setjoingroup, but you can’t invite bot to group either.
Update (2022): Links to phone numbers such as https://t.me/+1XXXXXXX will lead you to a web page the same as username links do, but you can only start chatting with the user if their privacy settings allows you. Old answer: It’s NOT possible to link to Telegram like this for a phone numbers so far, because … Read more
As @maak pointed out, you need to first send a message to the bot before the bot can send messages to you.
For that, you have to talk to BotFather. In the Telegram App, open the chat with BotFather. Send him /setcommands. He will present you with a list of your bots. Pick the bot for which you want to set the command menu. Compose and send the command list. Using your image as an example, these … Read more
Post one message from User to the Bot. Open https://api.telegram.org/bot<Bot_token>/getUpdates page. Find this message and navigate to the result->message->chat->id key. Use this ID as the [chat_id] parameter to send personal messages to the User.
Edit: now there is yet an easier way to do this – when creating your group, just mention the full bot name (eg. @UniversalAgent1Bot) and it will list it as you type. Then you can just tap on it to add it. Old answer: Create a new group from the menu. Don’t add any bots … Read more
Update: I created a GitHub repository with a very simple PHP application to illustrate the concept explained below: https://github.com/pevdh/telegram-auth-example Whether you use a webhook or not actually does not really matter. The “deep linking” explained: Let the user log in on an actual website with actual username-password authentication. Generate a unique hashcode (we will call … Read more
According to official documentation it is possible to mention user by its numerical id with markup: [inline mention of a user](tg://user?id=123456789)
Since v0.15 we have Map.from_struct/1 which does exactly this. defmodule User do defstruct [:name] end Map.from_struct(%User{name: “valim”}) #=> %{name: “valim”}