Open @BotFather in Telegram and send the /newbot command. 
Then, pick your bot name and username:
@BotFather will send you a unique string called bot token:
Keep this token secret! Your bot is now created.
How to register a new Telegram Bot with BotFather

Open @BotFather in Telegram and send the /newbot command. 
Then, pick your bot name and username:
@BotFather will send you a unique string called bot token:
Keep this token secret! Your bot is now created.