public String toString() {
boolean hasUser = (this.get("user") != null);
boolean hasPassword = (this.get("password") != null);
if (hasUser || hasPassword) {
AuthMaskingProperties clone = (AuthMaskingProperties) this.clone();
if (hasUser) clone.put("user", "******");
if (hasPassword) clone.put("password", "******");
return clone.normalToString();
} else return this.normalToString();
}