[keycloak-user] Create access to secured data for user

Hi. My name is Adam and I am new to keycloak. I want to create link/access point where user does'n input his password or send his secret in angular 2 application + rest client secured by keycloak. This access is for specified part of data but temporary not single access. What possibilities keycloak gives to resolve this feature? I think about generating token in other application on server and send it to user by email. This way I can use client secret. How to generate valid token accepted in keycloak without connection with it? But is this good approach? If it is what can I use to create this in best way? Can send request to keycloak for this kind of token for specified client for user requested? Adam Michalski