PowerShell script that will launch & sign onto Office 365 admin console

In my test environment at home I need to create a Server 2016 PowerShell script that will launch the Office 365 PowerShell command line commands and automatically sign on with an Office 365 administrator username and password.

This isn't a security hazard since this will only be used on an Office 365 test domain on a computer at home that no one else has access to.

Please provide me with the correct syntax for doing this.