code: public static AuthData getAuthData(String authDataAlias) throws LoginException {
          readLock.lock();
          try {
              AuthData authDataConfig = authDataMap.getService(authDataAlias);
              validateAuthDataConfig(authDataAlias, authDataConfig);
              return authDataConfig;
          } finally {
              readLock.unlock();
          }
      }
docs: Gets the auth data for the specified auth data alias.
  
  @param authDataAlias the auth data alias representing the auth data entry in the configuration.
  @return the auth data.