functions/Get-DbaCredential.ps1

#ValidationTags#Messaging,FlowControl,CodeStyle#
function Get-DbaCredential {
    <#
    .SYNOPSIS
        Gets SQL Credential information for each instance(s) of SQL Server.
 
    .DESCRIPTION
        The Get-DbaCredential command gets SQL Credential information for each instance(s) of SQL Server.
 
    .PARAMETER SqlInstance
        The target SQL Server instance or instances. This can be a collection and receive pipeline input to allow the function
        to be executed against multiple SQL Server instances.
 
    .PARAMETER SqlCredential
        Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
    .PARAMETER Name
        Only include specific names
        Note: if spaces exist in the credential name, you will have to type "" or '' around it.
 
    .PARAMETER ExcludeName
        Excluded credential names
 
    .PARAMETER Identity
        Only include specific identities
        Note: if spaces exist in the credential identity, you will have to type "" or '' around it.
 
    .PARAMETER ExcludeIdentity
        Excluded identities
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
    .NOTES
        Tags: Credential
        Author: Garry Bargsley (@gbargsley), http://blog.garrybargsley.com
 
        Website: https://dbatools.io
        Copyright: (c) 2018 by dbatools, licensed under MIT
        License: MIT https://opensource.org/licenses/MIT
 
    .LINK
        https://dbatools.io/Get-DbaCredential
 
    .EXAMPLE
        PS C:\> Get-DbaCredential -SqlInstance localhost
 
        Returns all SQL Credentials on the local default SQL Server instance
 
    .EXAMPLE
        PS C:\> Get-DbaCredential -SqlInstance localhost, sql2016 -Name 'PowerShell Proxy'
 
        Returns the SQL Credentials named 'PowerShell Proxy' for the local and sql2016 SQL Server instances
 
    .EXAMPLE
        PS C:\> Get-DbaCredential -SqlInstance localhost, sql2016 -Identity ad\powershell
 
        Returns the SQL Credentials for the account 'ad\powershell' on the local and sql2016 SQL Server instances
 
    #>

    [CmdletBinding()]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingPlainTextForPassword", "")]
    param (
        [parameter(Position = 0, Mandatory, ValueFromPipeline)]
        [DbaInstanceParameter[]]$SqlInstance,
        [PSCredential]$SqlCredential,
        [string[]]$Name,
        [string[]]$ExcludeName,
        [Alias('CredentialIdentity')]
        [string[]]$Identity,
        [Alias('ExcludeCredentialIdentity')]
        [string[]]$ExcludeIdentity,
        [Alias('Silent')]
        [switch]$EnableException
    )

    process {
        foreach ($instance in $SqlInstance) {
            try {
                $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential
            } catch {
                Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue
            }

            $credential = $server.Credentials

            if ($Name) {
                $credential = $credential | Where-Object { $Name -contains $_.Name }
            }

            if ($ExcludeName) {
                $credential = $credential | Where-Object { $ExcludeName -notcontains $_.Name }
            }

            if ($Identity) {
                $credential = $credential | Where-Object { $Identity -contains $_.Identity }
            }

            if ($ExcludeIdentity) {
                $credential = $credential | Where-Object { $ExcludeIdentity -notcontains $_.Identity }
            }

            foreach ($currentcredential in $credential) {
                Add-Member -Force -InputObject $currentcredential -MemberType NoteProperty -Name ComputerName -value $currentcredential.Parent.ComputerName
                Add-Member -Force -InputObject $currentcredential -MemberType NoteProperty -Name InstanceName -value $currentcredential.Parent.ServiceName
                Add-Member -Force -InputObject $currentcredential -MemberType NoteProperty -Name SqlInstance -value $currentcredential.Parent.DomainInstanceName

                Select-DefaultView -InputObject $currentcredential -Property ComputerName, InstanceName, SqlInstance, ID, Name, Identity, MappedClassType, ProviderName
            }
        }
    }
}