public String readPassword(String textToPrompt) {
    if (isHeadlessMode && isQuietMode()) {
      return null;
    }

    return readWithMask(textToPrompt, '*');
  }
Initializes default environment variables to default values
geode-gfsh/src/main/java/org/apache/geode/management/internal/cli/shell/Gfsh.java