Issues passing credentials to a function Azure Powershell - powershell

Question

Hi all I'm trying to pass server login credentials to my 'createSQLServer function but keep hitting the error 'Cannot process argument transformation on parameter 'creds'.userName'' I've tried a lot of different, even tried with a 'param block' but stull stuck. A push in the right direction would be appreciated, cheers.
###### SQL SERVER LOGIN CREDENTIALS
$userName = "aaron"
$password = "Password_1234"
$securePassword = ConvertTo-SecureString -String $password -AsPlainText -Force
$creds = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $userName, $securePassword
### SQL server names with resource group name appeneded
$server1 = "sqlserver1" + $resGroup
$serVerion = "12.0"
function createSQLserver ([string]$server1,[string]$server2, [string]$server3, [System.Management.Automation.PSCredential]$creds,[string]$server1Location, [string]$server2Location, [string]$server3Location, [string]$resGroup, [string]$serVerion, [string]$userName, [string]$password, [SecureString]$securePassword)
{
#Create server 1(Server A)
<#check to see if server exists - It exists, $continue is created and passed to
if statement to append two random characters to name#>
Write-Host "Creating First SQL Server"
$sqlServer = New-AzureRmSqlServer -ServerName $server1 -SqlAdministratorCredentials $creds -Location $server1Location -ResourceGroupName $resGroup -ServerVersion $serVerion -ErrorVariable continue -ErrorAction SilentlyContinue
if ($continue)
{
do {
$server1 = $server1 + (rand)
$sqlServer = New-AzureRmSqlServer -ServerName $server1 `
-SqlAdministratorCredentials $creds -Location $server1Location `
-ResourceGroupName $resGroup -ServerVersion "12.0" -ErrorVariable continue -ErrorAction SilentlyContinue
}
until(!$continue)
Write-Host 'exists creating new' $server1 'Created'
}else{
Write-Host $server1 ' Created'
}
Start-Sleep -s 2
}
createSQLserver $server1 $username $password $securePassword $creds $server1Location $resGroup $serVerion

Answer 1

You need to use your named parameters!
Here's a snippet of your first few parameters:
...
[string]$server1
,
[string]$server2
,
[string]$server3
,
[System.Management.Automation.PSCredential]$creds
...
And then the ones you're passing in to the function call
createSQLserver $server1 $username $password $securePassword ...
So because you're not using the names of your parameters, they are using their relative ordinal position i.e.
param | value
---------+----------------
$server1 | $server1
$server2 | $username
$server3 | $password
$creds | $securePassword
So what have we learned?
Always use named parameters!
createSQLserver -server1 $server1 -username $username -password $password -securePassword $securePassword
That should sort you out :-)