User

addedToAttachmentMenu

Type: boolean, optional

True, if this user added the bot to the attachment menu.

allowsWriteToPm

Type: boolean, optional

True, if this user allowed the bot to message them.

firstName

Type: string

First name of the user or bot.

id

Type: number

A unique identifier for the user or bot.

isBot

Type: boolean, optional

True, if this user is a bot. Returned in the receiver field only.

isPremium

Type: boolean, optional

True, if this user is a Telegram Premium user.

lastName

Type: string, optional

Last name of the user or bot.

languageCode

Type: string, optional

IETF language tag of the user's language. Returns in user field only.

photoUrl

Type: string, optional

URL of the user’s profile photo. The photo can be in .jpeg or .svg formats. Only returned for Web Apps launched from the attachment menu.

username

Type: string, optional

Username of the user or bot.