If your team is small and you don't want to hit up your colleagues' for their birth dates, as you already have a list of them, you can add these dates to the bot manually.
Let's open the bot on the Messages tab and type in, say, @Nick bday is Jan 4 (please replace Nick with the username of a person whose bday you want to record).
If the bot set the birth date successfully, it will reply to you with the following text message.
Still have questions about BirthdayBot?
Don't hesitate to contact us.