Can't get refresh token in msal login popup

Question

https://github.com/AzureAD/microsoft-authentication-library-for-js/blob/dev/samples/msal-angular-v2-samples/angular11-sample-app/src/app/app.component.ts

Please see the sample I referred. Basically,

loginPopup() {
    if (this.msalGuardConfig.authRequest){
      this.authService.loginPopup({...this.msalGuardConfig.authRequest} as PopupRequest)
        .subscribe((response: AuthenticationResult) => {
          this.authService.instance.setActiveAccount(response.account);
        });
      } else {
        this.authService.loginPopup()
          .subscribe((response: AuthenticationResult) => {
            this.authService.instance.setActiveAccount(response.account);
      });
    }

When I print the response in console, I can't get refresh token. Thanks for the help.