Are OAuth 2 access tokens only for the user that authorized?

[alexandrag2254]

At step number 3, after you successfully go through OAuth2 Authentication using the app consumer key and consumer secret, the app creator will get back an access token and access token secret. Are these tokens specifically for the app or for specific users? Basically wondering what it means when you say "you can use these access token and access token secret to make api requests to get data for user A only." And what info do we need to get from user A in order to make api calls on their data (their user id)? Thank you in advance! 

Moderator edit: moved to own topic

[JeremiahFitbit · Accepted solution]

OAuth 2.0 access/refresh tokens are specific to each user who authorizes your app. You need to obtain consent from each person whose data you want to access on their behalf.