added more API documentation

API/v1/portal-management/permissions/DELETE Permission.md

@@ -0,0 +1,57 @@
+# DELETE Permission
+This API call deletes a permission. This is only allowed by the superuser. 
+
+#### Location
+```
+/api/v1/portal-management/permissions/
+```
+
+#### Permissions required
+being `superuser`.
+
+#### Body parameters
+| Parameter       | Type | Required | Description                  |
+| --------------- | ---- | -------- | ---------------------------- |
+| permission_uuid | uuid | yes      | Unique id of the permission, |
+
+### Example Body (json)
+```json
+{
+        "permission_uuid": "e0a60eba-52f6-11f1-8bcc-bc2411125ba4",
+}
+```
+
+### Example Request
+```php
+$curl = curl_init();
+
+curl_setopt_array($curl, [
+    CURLOPT_URL => $baseUrl . '/api/v1/portal-management/permissions/',
+    CURLOPT_RETURNTRANSFER => true,
+    CURLOPT_POST => true,
+    CURLOPT_POSTFIELDS => $json_payload,
+    CURLOPT_HTTPHEADER => [
+        'Authorization: Bearer ' . $token,
+        'Content-Type: application/json',
+        'X-HTTP-Method-Override: DELETE'
+    ],
+]);
+
+$response = curl_exec($curl);
+$httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+
+if ($response === false) {
+    echo curl_error($curl);
+}
+
+curl_close($curl);
+```
+
+### Example Response
+```json
+"Permission deleted successfully."
+```
+
+#### Known errors or issues.
+None are known at the time
+If you do encounter issues and get an http code in return, check the response codes on this page.