What are the SMB credentials i should provide for vagrant while creating virtual box

The below ae the steps i did to create virtual box using vagrant in windows 10 ultimateOS.

Installed vagrant
The below commands i used
1.vagrant init hashicorp/bionic64
2.vagrant box add hashicorp/bionic64
3.vagrant up
a)here i selected my own switch from hypervisor

Issue::
You will be asked for the username and password to use for the SMB
default: folders shortly. Please use the proper username/password of your
default: account.
default:
default: Username (user[@domain]): vagrant
default: Password (will be hidden):
==> default: Credentials incorrect. Please try again.
==> default:
default: Username (*****): Dell
default: Password (will be hidden):
==> default: Credentials incorrect. Please try again.
==> default:
default: Username (Dell): Dell
default: Password (will be hidden):
==> default: Credentials incorrect. Please try again.
Some one help me in this issue. what is the step i am missing .

Note :: once i clicked enter enter enter the control comes to parent folder .Now once i enter vagrant ssh it works fine by entering in to virtual box.