async sendChannelAdminInvite(chatId, options = {}) {
        return this.client.sendChannelAdminInvite(chatId, this.id._serialized, options);
    }
Sends a channel admin invitation to a user, allowing them to become an admin of the channel
@param {string} chatId The ID of a user to send the channel admin invitation to
@param {SendChannelAdminInviteOptions} options 
@returns {Promise<boolean>} Returns true if an invitation was sent successfully, false otherwise