public boolean isSingleUse() {
        return singleUse;
    }
Returns whether this user data is intended for single-use only.
Single-use data cannot be used more than once. This flag only has
meaning if the data also has an expires timestamp.

@return
    true if this data is intended for single-use only, false
    otherwise.
extensions/guacamole-auth-json/src/main/java/org/apache/guacamole/auth/json/user/UserData.java