CDK UserpoolClient refreshTokenValidity duration fails to synthesize correctly

Question

```
new UserPoolClient(this, 'Client', {
  idTokenValidity: Duration.hours(2),
  accessTokenValidity: Duration.hours(2),
  // CDK BUG! sets to 1 minute which is error
  refreshTokenValidity: Duration.hours(12),
```
is synthesized as:

```
      TokenValidityUnits:
        AccessToken: minutes
        IdToken: minutes
        RefreshToken: minutes

RefreshTokenValidity: 1    // <- WRONG!
      IdTokenValidity: 120
      AccessTokenValidity: 120
```

Answer

In order to define the Cognito UserPool client, you can refer to the [addClient](https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_cognito.UserPool.html#addwbrclientid-options) function of the UserPool construct in CDK and then define the refreshTokenValidity duration to correctly synthesize the construct to the corresponding CloudFormation resource

```
const pool = new cognito.UserPool(this, 'Pool');
    const provider = new cognito.UserPoolIdentityProviderAmazon(this, 'Amazon', {
      userPool: pool,
      clientId: 'amzn-client-id',
      clientSecret: 'amzn-client-secret',
    });

const client = pool.addClient('app-client', {
      refreshTokenValidity: cdk.Duration.hours(12),
      idTokenValidity: cdk.Duration.hours(2),
      accessTokenValidity:cdk.Duration.hours(2),
      supportedIdentityProviders: [
        cognito.UserPoolClientIdentityProvider.AMAZON,
      ],
    });

client.node.addDependency(provider);
```

CDK UserpoolClient refreshTokenValidity duration fails to synthesize correctly

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