Since you are not in a domain environment, you will need to setup your windows 10 machine with the credentials needed to access the Hyper-V server.
You can add credentials by opening the 'Credential Manager' on your windows 10 system and selecting the 'Add a Windows Credential' option. Then simply enter the Hyper-V server name as the network address, and enter in the username and password you have setup on the Hyper-V server.
You may also need to configure some firewall rules on the Hyper-V server to allow the connection.
On your Hyper-V server, launch PowerShell and run the command: