restricting users on nodejs telegram bot - node.js

Question

I currently have a telegram bot giving my organisation users answers to FAQ questions
but I need to restrict it so only certain people that have paid for the mentorship are able to use the product
is there anyway I can ask people to enter a user id number that stores the information
in so if there not on the list in the code there cant access the bot
my bot is currently written in nodejs language (based on this repo).
[
{
"triggers": [
"hello",
"hi"
],
"replies": [
{
"reply": "Hi Im your Personal Lion Bot \r\n\r\nWhat do you want to focus on today\r\n\r\n>Trading Help\r\n\r\n>Business Help\r\n\r\n>Mindset\r\n\r\n>Schedule\r\n\r\n>Just Started\r\n\r\n>Help",
"type": "text"
}
]
},
{
"triggers": [
"trading",
"Trading"
],
"replies": [
{
"reply": "Ok you want to focus on trading\r\n\r\nHeres is what I can show you\r\n\r\n>Our Schedule\r\n\r\n>A Trading Gameplan\r\n\r\n>Trade Ideas\r\n\r\n>Trading Products",
"type": "text"
}
]
}
]

Answer 1

You need to know your paying users' ID, then you answer their messages only if msg.from.id is in your list of allowed users.
Something like:
function check_if_allowed(id) {
...
}
bot.on('message', (msg) => {
if (check_if_allowed(msg.from.id)) {
...
}
})
To find their ID depends on how you register them in your organization.
Add more details and code if you need further help