PublishTeamsApp.ps1

function PublishTeamsApp($FilePath, $AuthorizationToken) {   
    $baseUrl = "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps"
    $headers = @{}
    $headers.Add("Authorization", "Bearer $AuthorizationToken")
    $headers.Add("Content-Type", "application/zip")
    
    try {
        Invoke-RestMethod -Uri $baseUrl -Method 'POST' -Headers $headers -InFile $FilePath
    }
    catch {
        if ($null -ne $_.ErrorDetails) {
            Write-Error $_.ErrorDetails.Message
        }
    }
}