[WIP] Create the command suggest in this issue @dsccommunity/SqlServerDsc/issues/2111 . The command should throw an terminating error if the specified SQL Server principal does not exist as a SQL server login. The command should use SQL Server SMO. The comma...

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Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original description:

Create the command suggest in this issue @dsccommunity/SqlServerDsc/issues/2111 . The command should throw an terminating error if the specified SQL Server principal does not exist as a SQL server login. The command should use SQL Server SMO. The command should not use T-SQL to perform the task.
Also, here you can see an example how to get value from pipeline should work (parameter-block): @dsccommunity/SqlServerDsc/files/source/Public/Get-SqlDscAudit.ps1 and here you can find an example on how to thrown a terminating error: @dsccommunity/SqlServerDsc/files/source/Public/New-SqlDscAudit.ps1

Write unit tests that have at least 80% coverage, and simple integration tests for testing the command. Use the same pattern as existing commands are tested.

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