Deleted a user

I deleted a user by mistake , how can I get all the data back? I sent a new email but when he logged in all his data was gone?
TIA

Please see the following article regarding the removal of My Cloud Home users:

My Cloud Home: Invite and Remove Users

https://support-en.wd.com/app/answers/detailweb/a_id/16468

For data recovery, please see the following article:

My Cloud Home: Data Recovery

https://support-en.wd.com/app/answers/detailweb/a_id/26648

If further assistance is needed, please contact our support staff at the following:
https://support-en.wd.com/app/askweb