Function moduleNotifyUserChanged

app/redis-6.2.6/src/module.c:6423–6434

This function is called when a client's user has changed and invokes the * client's user changed callback if it was set. This callback should * cleanup any state the module was tracking about this client. * * A client's user can be changed through the AUTH command, module * authentication, and when a client is freed. */

 * A client's user can be changed through the AUTH command, module 
 * authentication, and when a client is freed. */
void moduleNotifyUserChanged(client *c) {
    if (c->auth_callback) {
        c->auth_callback(c->id, c->auth_callback_privdata);

        /* The callback will fire exactly once, even if the user remains 
         * the same. It is expected to completely clean up the state
         * so all references are cleared here. */
        c->auth_callback = NULL;
        c->auth_callback_privdata = NULL;
        c->auth_module = NULL;
    }
}

void revokeClientAuthentication(client *c) {
    /* Freeing the client would result in moduleNotifyUserChanged() to be