Run PowerShell as elevated for another user

I am trying to run a command as the Admin user with elevated permissions but PowerShell doesn't support this method.

Start-Process 
-FilePath "powershell" 
-ArgumentList "-Command New-RDSessionDeployment -ConnectionBroker $server -WebAccessServer $server -SessionHost $server" 
-Verb RunAs 
-Credential $creds

Start-Process : Parameter set cannot be resolved using the specified named parameters.

The combination of Verb and Credential are not supported.

NAME
    Start-Process

SYNTAX
    Start-Process [-FilePath] <string> [[-ArgumentList] <string[]>] [-Credential <pscredential>] [-WorkingDirectory <string>] [-LoadUserProfile] [-NoNewWindow] [-PassThru] [-RedirectStandardError <string>]
    [-RedirectStandardInput <string>] [-RedirectStandardOutput <string>] [-WindowStyle {Normal | Hidden | Minimized | Maximized}] [-Wait] [-UseNewEnvironment]  [<CommonParameters>]

    Start-Process [-FilePath] <string> [[-ArgumentList] <string[]>] [-WorkingDirectory <string>] [-PassThru] [-Verb <string>] [-WindowStyle {Normal | Hidden | Minimized | Maximized}] [-Wait]  [<CommonParameters>]

So how can I run an elevated powershell as another user??

UPDATE: I've come up with this nasty solution but unfortunately it prompts me to approve Elevated permissions which of course is because of UAT.

Start-Process 
-Credential $creds 
-FilePath "powershell" 
-ArgumentList "Start-Process 
    -Verb RunAs 
    -FilePath powershell 
    -ArgumentList '-Command New-RDSessionDeployment -ConnectionBroker $server -WebAccessServer $server -SessionHost $server'"

Is there a way to run that above command as the Domain Admin for automated deployment??