return null;
        }

        @Override
        public boolean isUserInRole(String role) {
            return false;
        }

        @Override
        public Principal getUserPrincipal() {
            return null;
        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override

     */
    protected String replaceCredentials(final Credentials credentials, final String value) {
        if (StringUtil.isNotBlank(value)) {
            return value.replace(USERNAME, credentials.getUserPrincipal().getName()).replace(PASSWORD, credentials.getPassword());
        }
        return StringUtil.EMPTY;
    }

    /**
     * Returns a string representation of this object.

        }

        @Override
        public boolean isUserInRole(String role) {
            return false;
        }

        @Override
        public java.security.Principal getUserPrincipal() {
            return null;
        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override

            }

            @Override
            public boolean isUserInRole(String role) {
                return false;
            }

            @Override
            public java.security.Principal getUserPrincipal() {
                return null;
            }

            @Override
            public String getRequestedSessionId() {
                return null;
            }

            @Override

            }

            @Override
            public boolean isUserInRole(String role) {
                return false;
            }

            @Override
            public java.security.Principal getUserPrincipal() {
                return null;
            }

            @Override
            public String getRequestedSessionId() {
                return null;
            }

            @Override

        @Override
        public boolean isUserInRole(String role) {
            throw new UnsupportedOperationException();
        }

        @Override
        public java.security.Principal getUserPrincipal() {
            throw new UnsupportedOperationException();
        }

        @Override
        public String getRequestedSessionId() {
            throw new UnsupportedOperationException();
        }

        }

        @Override
        public boolean isUserInRole(String role) {
            return false;
        }

        @Override
        public java.security.Principal getUserPrincipal() {
            return null;
        }

        @Override
        public String getRequestedSessionId() {
            return null;
        }

        @Override