Hi @aghabalaguluzade, I'm not sure I understand your question so perhaps you can rephrase it.

If you are asking about vue.js I'm not sure that you will get much help here, this is a support forum for the tmdb api.

It looks like you are already aware of the api doc, but here are some basic pages to help describe the authentication for application, user, and for guest sessions. Also, how to generate a session id.

I've seen things like can this help me to register users?

You can track users inside your app in any way you want. If you need to retrieve general tmdb data you can do so with a single api key for the app. If you want your users to be able to access tmdb user specific information like account details or personal lists, then you would have to create a session id for each user.

Maybe you can use the another platform to register the user and when user is registered then you can create the session id.