title: Get ID token of a user using custom Admin REST API in Keycloak
body: <p>In a system I'm developing now, I want to get an ID token of a user in my Keycloak server using admin REST API of Keycloak, without knowing the password of the user (i.e., using only the password of an admin user).</p>
  <p>That is, I want to have an admin API like
  <code>GET /{realm}/users/{id}/id-token</code>.</p>
  <p>Is it possible to realize this?</p>
  <p>(The document of Keycloak says it is possible to implement custom API endpoints (<a href="https://www.keycloak.org/docs/latest/server_development/index.html#_extensions_rest" rel="nofollow noreferrer">https://www.keycloak.org/docs/latest/server_development/index.html#_extensions_rest</a>),
  but I'm not sure if I can add my desired function.)</p>