changePhoneNumber

Changes user's phone number and sends authentication code to the new user's phone number.
Returns authStateWaitCode with information about sent code on success.

• phone_number New user's phone number in any reasonable format.
• allow_flash_call Pass True, if code can be sent via flash call to the specified phone number.
• is_current_phone_number Pass true, if the phone number is used on the current device. Ignored if allow_flash_call is False.