Public/Access/Get-VerkadaAccessUser.ps1

function Get-VerkadaAccessUser{
    <#
        .SYNOPSIS
        Gets an Access User in an organization using https://apidocs.verkada.com/reference/getaccessuserviewv1

        .DESCRIPTION
        Given the Verkada created User ID or the user defined External ID, retrieve the Access Object Information for the specified user.
        The reqired token can be directly submitted as a parameter, but is much easier to use Connect-Verkada to cache this information ahead of time and for subsequent commands.

        .LINK
        https://github.com/bepsoccer/verkadaModule/blob/master/docs/function-documentation/Get-VerkadaAccessUser.md

        .EXAMPLE
        Get-VerkadaAccessUser -userId '801c9551-b04c-4293-84ad-b0a6aa0588b3'
        This will retrieve the Access user with userId 801c9551-b04c-4293-84ad-b0a6aa0588b3. The token will be populated from the cache created by Connect-Verkada.
        
        .EXAMPLE
        Get-VerkadaAccessUser -externalId 'newUserUPN@contoso.com' -x_verkada_auth_api 'sd78ds-uuid-of-verkada-token'
        This will retrieve the Access user with externalId newUserUPN@contoso.com. The token is submitted as a parameter in the call.
    #>

    [CmdletBinding(PositionalBinding = $true)]
    [Alias("Get-VrkdaAcUsr","gt-VrkdaAcUsr")]
    param (
        #The UUID of the user
        [Parameter(ValueFromPipelineByPropertyName = $true)]
        [ValidateNotNullOrEmpty()]
        [ValidatePattern('^[0-9a-f]{8}-[0-9a-f]{4}-[0-5][0-9a-f]{3}-[089ab][0-9a-f]{3}-[0-9a-f]{12}$')]
        [Alias('user_id')]
        [String]$userId,
        #unique identifier managed externally provided by the consumer
        [Parameter(ValueFromPipelineByPropertyName = $true)]
        [Alias('external_id')]
        [String]$externalId,
        #The public API token obatined via the Login endpoint to be used for calls that hit the public API gateway
        [Parameter()]
        [ValidateNotNullOrEmpty()]
        [String]$x_verkada_auth_api = $Global:verkadaConnection.x_verkada_auth_api,
        #The region of the public API to be used
        [Parameter()]
        [ValidateSet('api','api.eu','api.au')]
        [String]$region='api',
        #Switch to write errors to file
        [Parameter()]
        [switch]$errorsToFile
    )
    
    begin {
        $url = "https://$($region).verkada.com/access/v1/access_users/user"
        #parameter validation
        if ([string]::IsNullOrEmpty($x_verkada_auth_api)) {throw "x_verkada_auth_api is missing but is required!"}
        $myErrors = @()
    } #end begin
    
    process {
        if ([string]::IsNullOrEmpty($externalId) -and [string]::IsNullOrEmpty($userId)){
            Write-Error "Either externalId or userId required"
            return
        }

        $body_params = @{}
        
        $query_params = @{}
        if (!([string]::IsNullOrEmpty($userId))){
            $query_params.user_id = $userId
        } elseif (!([string]::IsNullOrEmpty($externalId))){
            $query_params.external_id = $externalId
        }
        
        try {
            $response = Invoke-VerkadaRestMethod $url $x_verkada_auth_api $query_params -body_params $body_params -method GET
            return $response
        }
        catch [Microsoft.PowerShell.Commands.HttpResponseException] {
            $err = $_.ErrorDetails | ConvertFrom-Json
            $errorMes = $_ | Convertto-Json -WarningAction SilentlyContinue
            $err | Add-Member -NotePropertyName StatusCode -NotePropertyValue (($errorMes | ConvertFrom-Json -Depth 100 -WarningAction SilentlyContinue).Exception.Response.StatusCode) -Force
            $msg = "$($err.StatusCode) - $($err.message)"
            $msg += ": $(($query_params + $body_params) | ConvertTo-Json -Compress)"
            Write-Error $msg
            $myErrors += $msg
            $msg = $null
        }
        catch [VerkadaRestMethodException] {
            $msg = $_.ToString()
            $msg += ": $(($query_params + $body_params) | ConvertTo-Json -Compress)"
            Write-Error $msg
            $myErrors += $msg
            $msg = $null
        }
    } #end process
    
    end {
        if ($errorsToFile.IsPresent){
            if (![string]::IsNullOrEmpty($myErrors)){
                Get-Date | Out-File ./errors.txt -Append
                $myErrors | Out-File ./errors.txt -Append
            }
        }
    } #end end
} #end function