How to use the ms.license function in ms

'ms.teams',
    'ms.template',
    'ms.project-type',
  ];
  const properties = {};
  const parameters = bodyOverride || req.body;
  ourFields.forEach((fieldName) => {
    if (parameters[fieldName] !== undefined) {
      properties[fieldName] = parameters[fieldName];
      delete parameters[fieldName];
    }
  });
  const msProperties = {
    onBehalfOf: properties['ms.onBehalfOf'] || req.headers['ms-onbehalfof'],
    justification: properties['ms.justification'] || req.headers['ms-justification'],
    license: properties['ms.license'] || req.headers['ms-license'],
    approvalType: properties['ms.approval'] || req.headers['ms-approval'],
    approvalUrl: properties['ms.approval-url'] || req.headers['ms-approval-url'],
    notify: properties['ms.notify'] || req.headers['ms-notify'],
    teams: properties['ms.teams'] || req.headers['ms-teams'],
    template: properties['ms.template'] || req.headers['ms-template'],
    projectType: properties['ms.project-type'] || req.headers['ms-project-type'],
  };
  // Validate licenses
  let msLicense = msProperties.license;
  if (!msLicense) {
    throw jsonError(new Error('Missing Microsoft license information'), 422);
  }
  msLicense = msLicense.toLowerCase();
  if (supportedLicenseExpressions.indexOf(msLicense) < 0) {
    throw jsonError(new Error('The provided license expression is not currently supported'), 422);
  }

translateValue(body, 'justification', 'ms.justification');
  translateValue(body, 'legalEntity', 'ms.entity');
  translateValue(body, 'projectType', 'ms.project-type');
  // Team permissions
  if (!body.selectedAdminTeams || !body.selectedAdminTeams.length) {
    return next(jsonError('No administration team(s) provided in the request', 400));
  }
  translateTeams(body);
  // Initial repo contents and license
  const templates = _.keyBy(organization.getRepositoryCreateMetadata().templates, 'id');
  const template = templates[body.template];
  if (!template) {
    return next(jsonError('There was a configuration problem, the template metadata was not available for this request', 400));
  }
  translateValue(body, 'template', 'ms.template');
  body['ms.license'] = template.spdx || template.name; // Today this is the "template name" or SPDX if available
  translateValue(body, 'gitIgnoreTemplate', 'gitignore_template');
  if (!body['ms.notify']) {
    body['ms.notify'] = req.knownRequesterMailAddress || config.brand.operationsMail || config.brand.supportMail;
  }
  // these fields are currently ignored: orgName
  delete body.orgName;
  delete body.claEntity; // a legacy value
  req.app.settings.providers.insights.trackEvent({
    name: 'ApiClientNewOrgRepoStart',
    properties: {
      body: JSON.stringify(req.body),
    },
  });
  let success: ICreateRepositoryApiResult = null;
  try {
    success = await CreateRepository(req, body);