Add Cmdlets to Show / Remove SelfService Api Key

Fixes #35

Author: LordHepipud

lib/core/tools/Remove-IcingaDirectorSelfServiceKey.psm1

@@ -0,0 +1,14 @@
+function Remove-IcingaDirectorSelfServiceKey()
+{
+    $Path  = 'IcingaDirector.SelfService.ApiKey';
+    $Value = Get-IcingaPowerShellConfig $Path;
+    if ($null -ne $Value) {
+        Remove-IcingaPowerShellConfig 'IcingaDirector.SelfService.ApiKey';
+        $Value = Get-IcingaPowerShellConfig $Path;
+        if ($null -eq $Value) {
+            Write-Host 'Icinga Director Self-Service Api key was successfully removed. Please dont forget to drop it within the Icinga Director as well';
+        }
+    } else {
+        Write-Host 'There is no Self-Service Api key configured on this system';
+    }
+}

lib/core/tools/Show-IcingaDirectorSelfServiceKey.psm1

@@ -0,0 +1,11 @@
+function Show-IcingaDirecorSelfServiceKey()
+{
+    $Path  = 'IcingaDirector.SelfService.ApiKey';
+    $Value = Get-IcingaPowerShellConfig $Path;
+
+    if ($null -ne $Value) {
+        Write-Host ([string]::Format('Self-Service Key: "{0}"', $Value));
+    } else {
+        Write-Host 'There is no Self-Service Api key configured on this system';
+    }
+}