[keycloak-user] Users and bearer tokens managment

Hi, I read all the doc but still can't understand how bearer tokens generation works. Every user should generate/manage personal bearer tokens, is this possibile? I should create a "client" for every user? PS: If is not clear if user 1 generates the token "abcd" and make a request to api.mysite.com I should know that the token belongs to user 1. Thanks, Rocco