Allow passing connection info as string params, better instructions

ABMPS.psd1

@@ -12,7 +12,7 @@
 RootModule = 'AppleBusinessManager.psm1'
 
 # Version number of this module.
-ModuleVersion = '1.0'
+ModuleVersion = '1.1'
 
 # Supported PSEditions
 # CompatiblePSEditions = @()

AppleBusinessManager.psm1

@@ -1,13 +1,20 @@
 #Requires -Version 7.0
 #Requires -Module jwtPS
 function Connect-AppleBusinessManager {
+    [CmdletBinding(DefaultParameterSetName = 'EnvironmentVariable')]
+    param(
+        [string][Parameter(ParameterSetName = 'PrivateKeyAsString', Mandatory)]$ClientId,
+        [string][Parameter(ParameterSetName = 'PrivateKeyAsString', Mandatory)]$PrivateKey,
+        [string][Parameter(ParameterSetName = 'PrivateKeyAsString', Mandatory)]$PrivateKeyId
+    )
+    if ($PSCmdlet.ParameterSetName -eq 'EnvironmentVariable') {
         if (-not $Env:AppleBusinessManagerClientId -or -not $Env:AppleBusinessManagerPrivateKeyId -or -not $Env:AppleBusinessManagerPrivateKey) {
             throw "Client ID, Private Key ID and Private Key environment variables were not set for Apple Business Manager"
         }
         $Script:ClientId = $Env:AppleBusinessManagerClientId
         $Script:PrivateKey = $Env:AppleBusinessManagerPrivateKey
         $Script:PrivateKeyId = $Env:AppleBusinessManagerPrivateKeyId
-
+    }
     $Header = @{
         'kid' = $Script:PrivateKeyId
     }

README.md

@@ -1,3 +1,23 @@
 # Apple Business Manager API Module for PowerShell
-To use this module, you'll need to convert the private key from Apple to a .NET friendly format:
+PowerShell Module that authenticates and gets data from the Apple Business Manager APIs
-```openssl pkcs8 -topk8 -inform PEM -outform PEM -in [path to your key from Apple] -out [path to where you want to save the converted key] -nocrypt```
+## Installing the module
+This module can be installed [from the PowerShell Gallery][powershell-gallery] using the following command:
+```PowerShell
+Install-Module -Name AMBPS
+```
+## Converting your private key
+The private key that you can download from the Apple Business Manager portal isn't in a format that is currently supported. To use this module, you'll need to convert it, for example, using openssl:
+```shell
+openssl pkcs8 -topk8 -inform PEM -outform PEM -in FROM_APPLE_PATH.pem -out CONVERTED_PATH.pem -nocrypt
+```
+# Using the module
+After converting, you can connect to Apple Business Manager's APIs with the following commands, then use other commands to retrieve data:
+```PowerShell
+$PrivateKey = (Get-Content -Path 'CONVERTED_PATH.pem') -join ''
+
+Connect-AppleBusinessManager -ClientId 'YOUR_CLIENT_ID' -PrivateKey $PrivateKey -PrivateKeyId 'YOUR_PRIVATE_KEY_ID'
+
+Get-AppleBusinessManagerOrgDevices
+```
+
+[powershell-gallery]: https://www.powershellgallery.com/packages/ABMPS/