how to create new repository in github via powershell

Function New-GitHubRepository {
[cmdletbinding(SupportsShouldProcess)]

Param(
[Parameter(Position = 0, Mandatory, HelpMessage = "Enter the new repository name")]
[ValidateNotNullorEmpty()]
[string]$Name,

[string]$Description,

[switch]$Private,
[switch]$NoWiki,
[switch]$NoIssues,
[switch]$NoDownloads,
[switch]$AutoInitialize,

#license templates found at https://github.com/github/choosealicense.com/tree/gh-pages/_licenses
[ValidateSet("MIT","apache-2.0","gpl-3.0","ms-pl","unlicense")]
[string]$LicenseTemplate,

[Alias("token")]
[ValidateNotNullorEmpty()]
[string]$UserToken = $gitToken,

#write full native response to the pipeline
[switch]$Raw
)

Write-Verbose "[BEGIN  ] Starting: $($MyInvocation.Mycommand)"
#display PSBoundparameters formatted nicely for Verbose output  
[string]$pb = ($PSBoundParameters | Format-Table -AutoSize | Out-String).TrimEnd()
Write-Verbose "[BEGIN  ] PSBoundparameters: `n$($pb.split("`n").Foreach({"$("`t"*2)$_"}) | Out-String) `n" 

#create the header
$head = @{
Authorization = 'Basic ' + $UserToken
}

#create a hashtable from properties
$hash = @{
 name = $Name
 description = $Description
 private = $Private -as [boolean]
 has_wiki = (-Not $NoWiki)
 has_issues = (-Not $NoIssues)
 has_downloads = (-Not $NoDownloads)
 auto_init = $AutoInitialize -as [boolean]
}

if ($LicenseTemplate) {
    $hash.add("license_template",$LicenseTemplate)
}

$body = $hash | ConvertTo-Json

Write-Verbose "[PROCESS] Sending json"
Write-Verbose $body

#define parameter hashtable for Invoke-RestMethod
$paramHash = @{
Uri = "https://api.github.com/user/repos" 
Method = "Post"
body = $body 
ContentType = "application/json"
Headers = $head
UseBasicParsing = $True
DisableKeepAlive = $True
}

#should process
if ($PSCmdlet.ShouldProcess("$name [$description]")) {
   $r = Invoke-RestMethod @paramHash

    if ($r.id -AND $Raw) {
        Write-Verbose "[PROCESS] Raw result"
        $r

    } elseif ($r.id) {
        write-Verbose "[PROCESS] Formatted results"

        $r | Select-Object @{Name = "Name";Expression = {$_.name}},
        @{Name = "Description";Expression = {$_.description}},
        @{Name = "Private";Expression = {$_.private}},
        @{Name = "Issues";Expression = {$_.has_issues}},
        @{Name = "Wiki";Expression = {$_.has_wiki}},
        @{Name = "URL";Expression = {$_.html_url}},
        @{Name = "Clone";Expression = {$_.clone_url}}
    } else {
        
        Write-Warning "Something went wrong with this process"
    }

    if ($r.clone_url) {
      $msg = @"

To push an existing local repository to Github run these commands:
-> git remote add origin $($r.clone_url)"
-> git push -u origin master

"@
    Write-Host $msg -ForegroundColor Green

    }
}

Write-Verbose "[END    ] Ending: $($MyInvocation.Mycommand)"

}