$username = "uname"
$password = "pword"

$boundary = [guid]::NewGuid().ToString().Replace("-", "").Substring(0, 16)
$enc = [System.Text.Encoding]::GetEncoding("utf-8")
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $username,$password)))

$headers = @{}
$headers.Add("Host", "api.bitbucket.org")
$headers.Add("Authorization", "Basic $base64AuthInfo")

$repoResult
    $repoResult = Invoke-WebRequest -Uri "https://bitbucket.org/teamAccount/repoName/get/master.zip" -Method GET -Verbose -OutFile .output.zip #-Method GET -Headers $headers -Verbose
}