#include <assert.h>
#include <mongoc/mongoc.h>

static mongoc_oidc_credential_t *
oidc_fn(mongoc_oidc_callback_params_t *params) {
  const char *got = mongoc_oidc_callback_params_get_username(params);
  assert(got && 0 == strcmp(got, "user")); // Fails!
  return NULL;
}

int main() {
  mongoc_init();

  mongoc_client_t *client = mongoc_client_new(
      "mongodb://user@localhost:27017/?authMechanism=MONGODB-OIDC");
  mongoc_oidc_callback_t *cb = mongoc_oidc_callback_new(oidc_fn);
  mongoc_client_set_oidc_callback(client, cb);
  bson_t *ping = BCON_NEW("ping", BCON_INT32(1));
  mongoc_client_command_simple(client, "admin", ping, NULL, NULL, NULL);
  bson_destroy(ping);
  mongoc_oidc_callback_destroy(cb);
  mongoc_client_destroy(client);
  mongoc_cleanup();
}