docs: @IocBean(name = "mongodbCredentialList")
      public List<MongoCredential> getCredentialList() {
          List<MongoCredential> credentials = new ArrayList<>();
          if (conf.containsKey(PROP_USERNAME)) {
              credentials.add(MongoCredential.createScramSha1Credential(conf.get(PROP_USERNAME), conf.get(PROP_SOURCE), conf.get(PROP_PASSWORD, "").toCharArray()));
          }
          return credentials;
      }