TypeError: Class constructor RequestAdapter cannot be invoked without 'new'

[jkone27]

TypeError: Class constructor RequestAdapter cannot be invoked without 'new'

not sure what i have to change for this to work...

import { RequestAdapter } from '@smartbear/fake-ap';

const apiMock = {
  jiraUser: {
    displayName: 'test-account',
    avatarUrls: {
        '32x32' : ''
    }
  },
  issues: [ ],
  fields: [ ],
  configuration: {}
};

class MockBackend extends RequestAdapter {
    constructor() {
      super()
    }
    
    async request() {

      console.log('request!');

      return {
        body: `${JSON.stringify(apiMock)}`
      };
    }
}

export default MockBackend