Feature request: add phone number information

[zdch26]

Telegram could request phone number form user (https://core.telegram.org/bots/2-0-intro#locations-and-numbers) Adding this info (if provided) to mc (new column in /mc/users) will be usefull for user "identification" and (as option) authorisation for private bot.

[mariodafiero]

I'm working on It but

Telegram could request phone number form user Must be done in a separate flow