Add secret provider functionality and enhance configuration data resolution

Private/ConvertTo-ConfigurationDataCredential.ps1

@@ -0,0 +1,19 @@
+function ConvertTo-ConfigurationDataCredential {
+    [CmdletBinding()]
+    Param(
+        [Parameter(Mandatory=$true)]
+        [string]
+        $UserName,
+
+        [Parameter(Mandatory=$true)]
+        $Password
+    )
+
+    if($Password -is [System.Security.SecureString]){
+        $SecurePassword = $Password
+    }else{
+        $SecurePassword = ConvertTo-SecureString -String ([string]$Password) -AsPlainText -Force
+    }
+
+    return [System.Management.Automation.PSCredential]::new($UserName, $SecurePassword)
+}