# Information

TikTok has `2` different ways which they use to identify a user, these two are called `sec_user_id` & `user_id`. Most requests that you will be doing when a user is related, `sec_user_id` will be used. There may be some instances where you'll need to use `user_id` but `sec_user_id` is definitely the most important one to keep in mind.

It's also good to keep in mind that TikToks User API is 99% of the time using these IDs & not `username/unique_id`, which means we are not in control of wether to use usernames or ids.

There's also a 3rd ID which you will be using a lot if you want to interact with our Live API, that ID is called `room_id`. This is the ID of a users current livestream, anything related to the Live API will use this ID to identify the livestream.

Here's an example of all the IDs:

```json
{
    "sec_user_id": "MS4wLjABAAAAmmP1sDfuWs5mcmzoWZMCdHzl73axK353fbvtgifLfT7IiF2dtBPMKBcIeGCHFLKT",
    "user_id": "7030569423573779462",
    "room_id": "7630589423973772452"
}
```