Passing Credential on Invoke-RestMethod for AzureDevOps API to Retrieve Users - api

Question

I am trying to create a powershell script that will retrieve a number of users from AzureDevOps organization using REST API. I have encrypted my password and placed it in credentials, however I am getting an error like this:
Invoke-RestMethod : Cannot process argument transformation on parameter
'Credential'.
userName
At D:\Others\Retrieve Users.ps1:11 char:80
+ ... stakeholderUrl -Method Get -Credential $webclient.Credentials).identi
...
+ ~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Invoke-RestMethod],
ParameterBindingArgumentTransformationException
+ FullyQualifiedErrorId :
ParameterArgumentTransformationError,Microsoft.PowerShell.
Commands.InvokeRestMethodCommand
Here is my Powershell Script Code:
$stakeholderUrl =
"https://vsaex.dev.azure.com/[organizationName]/_apis/userentitlements?api-
version=5.0-preview.2"
$password = Get-Content D:\GetUsers\password.txt | ConvertTo-SecureString -
Key (Get-Content D:\GetUsers\aes.key)
$credential = New-Object
System.Net.NetworkCredential("sample#abc.com",$password)
$stakeholder = (Invoke-RestMethod -Uri $stakeholderUrl -Method Get -
Credential $credential).identities
$StakeholderUsers = #()
foreach($user in $stakeholder){
$customObject = new-object PSObject -property #{
"Display Name" = $user.displayName
"Email" = $user.mailAddress
"License" = $user.licenseDisplayName
}
$StakeholderUsers += $customObject
}
$StakeholderUsers | Select `
displayName,
mailAddress,
licenseDisplayName
I would appreciate if you could help me on this.
Thanks!

Answer 1

Store the credentials in this way:
domain\username:password
$Credentials= Get-Content D:\GetUsers\Credentials.txt
Create the Base64-encoded Basic authorization header:
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}" -f $Credentials)))
Invoke the rest:
$result = Invoke-RestMethod -Uri $uri -Method Get -ContentType "application/json" -Headers #{Authorization=("Basic {0}" -f $base64AuthInfo)}