code: public static Collection<IAutoCredentials> GetAutoCredentials(Map storm_conf) {
          try {
              Set<IAutoCredentials> autos = new HashSet<IAutoCredentials>();
              Collection<String> clazzes = (Collection<String>) storm_conf.get(Config.TOPOLOGY_AUTO_CREDENTIALS);
              if (clazzes != null) {
                  for (String clazz : clazzes) {
                      IAutoCredentials a = (IAutoCredentials) Class.forName(clazz).newInstance();
                      a.prepare(storm_conf);
                      autos.add(a);
                  }
              }
              LOG.info("Got AutoCreds " + autos);
              return autos;
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
docs: Get all of the configured AutoCredential Plugins.
  
  @param storm_conf the storm configuration to use.
  @return the configured auto credentials.