How to use the taskcluster-lib-scopes.validScope function in taskcluster-lib-scopes

if (typeof cert.seed !== 'string') {
      throw new Error('ext.certificate.seed must be a string');
    }
    if (cert.seed.length !== 44) {
      throw new Error('ext.certificate.seed must be 44 characters');
    }
    if (typeof cert.start !== 'number') {
      throw new Error('ext.certificate.start must be a number');
    }
    if (typeof cert.expiry !== 'number') {
      throw new Error('ext.certificate.expiry must be a number');
    }
    if (!(cert.scopes instanceof Array)) {
      throw new Error('ext.certificate.scopes must be an array');
    }
    if (!cert.scopes.every(utils.validScope)) {
      throw new Error('ext.certificate.scopes must be an array of valid scopes');
    }

    // Check start and expiry
    let now = new Date().getTime();
    if (cert.start > now + 5 * 60 * 1000) {
      throw new Error('ext.certificate.start > now');
    }
    if (cert.expiry < now - 5 * 60 * 1000) {
      throw new Error('ext.certificate.expiry < now');
    }
    // Check max time between start and expiry
    if (cert.expiry - cert.start > 31 * 24 * 60 * 60 * 1000) {
      throw new Error('ext.certificate cannot last longer than 31 days!');
    }

if (typeof cert.seed !== 'string') {
      throw new Error('ext.certificate.seed must be a string');
    }
    if (cert.seed.length !== 44) {
      throw new Error('ext.certificate.seed must be 44 characters');
    }
    if (typeof cert.start !== 'number') {
      throw new Error('ext.certificate.start must be a number');
    }
    if (typeof cert.expiry !== 'number') {
      throw new Error('ext.certificate.expiry must be a number');
    }
    if (!(cert.scopes instanceof Array)) {
      throw new Error('ext.certificate.scopes must be an array');
    }
    if (!cert.scopes.every(utils.validScope)) {
      throw new Error('ext.certificate.scopes must be an array of valid scopes');
    }

    // Check start and expiry
    let now = new Date().getTime();
    if (cert.start > now + 5 * 60 * 1000) {
      throw new Error('ext.certificate.start > now');
    }
    if (cert.expiry < now - 5 * 60 * 1000) {
      throw new Error('ext.certificate.expiry < now');
    }
    // Check max time between start and expiry
    if (cert.expiry - cert.start > 31 * 24 * 60 * 60 * 1000) {
      throw new Error('ext.certificate cannot last longer than 31 days!');
    }