How to use the jsrsasign.jws.IntDate function in jsrsasign

const JITSI_OPTIONS = {
			jitsi_domain: jitsiDomain,
			jitsi_lifetime_token: '1hour', // only 1 hour (for security reasons)
			jitsi_application_id: jitsiApplicationId,
			jitsi_application_secret: jitsiApplicationSecret,
		};

		const HEADER = {
			typ: 'JWT',
			alg: 'HS256',
		};

		const commonPayload = {
			iss: JITSI_OPTIONS.jitsi_application_id,
			sub: JITSI_OPTIONS.jitsi_domain,
			iat: jws.IntDate.get('now'),
			nbf: jws.IntDate.get('now'),
			exp: jws.IntDate.get(`now + ${ JITSI_OPTIONS.jitsi_lifetime_token }`),
			aud: 'RocketChat',
			room: '*',
			context: '', // first empty
		};

		const header = JSON.stringify(HEADER);
		const payload = JSON.stringify(addUserContextToPayload(commonPayload));

		return jws.JWS.sign(HEADER.alg, header, payload, { rstr: JITSI_OPTIONS.jitsi_application_secret });
	},
});

jitsi_domain: jitsiDomain,
			jitsi_lifetime_token: '1hour', // only 1 hour (for security reasons)
			jitsi_application_id: jitsiApplicationId,
			jitsi_application_secret: jitsiApplicationSecret,
		};

		const HEADER = {
			typ: 'JWT',
			alg: 'HS256',
		};

		const commonPayload = {
			iss: JITSI_OPTIONS.jitsi_application_id,
			sub: JITSI_OPTIONS.jitsi_domain,
			iat: jws.IntDate.get('now'),
			nbf: jws.IntDate.get('now'),
			exp: jws.IntDate.get(`now + ${ JITSI_OPTIONS.jitsi_lifetime_token }`),
			aud: 'RocketChat',
			room: '*',
			context: '', // first empty
		};

		const header = JSON.stringify(HEADER);
		const payload = JSON.stringify(addUserContextToPayload(commonPayload));

		return jws.JWS.sign(HEADER.alg, header, payload, { rstr: JITSI_OPTIONS.jitsi_application_secret });
	},
});