Getting yargs_1.default.options is not a function while using the yargs

Question

I am trying to use yargs library in my nestjs framework application, where few parameters i will be taking from command line args, if these parameters are not provided, I will be using the default one. Here is my cli.ts file.

import yargs from 'yargs';

const argv = yargs
  .options('awsRegion', {
    description: 'AWS Region (e.g. us-east-1, us-west-1)',
    alias: 'aws-region',
    type: 'string',
    default: 'aws-east-1',
  })
  .options('avbLeaderId', {
    description: 'leader id to be used for leader election',
    alias: 'avb-leader-id',
    type: 'string',
    default: 'avb-leader-id',
  })
  .parseSync();

export default argv;

When I am trying to access the Property in constructor of a DB class -

export class DbService {
  private client: DynamoDB;
 
  constructor() {

    this.client = new DynamoDB({
      region: argv.awsRegion,
    });
    
  }

I am getting following errors when i run using npm run start:dev --aws-region=us-west-1 -

.options('awsRegion', {
   ^
TypeError: yargs_1.default.options is not a function

I have tried to go through documentation, but i am not gettting it.

Any help will be much appreciated.