I know, I know, this is not how I’m supposed to do it, but I can't think of something better.

composer.json

@@ -0,0 +1,24 @@
+{
+    "name": "siteworx/mail-client",
+    "description": "api client for the siteworx professionals api",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Siteworx Pro",
+            "email": "websites@siteworxpro.com"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "Siteworx\\Mail\\": "src/"
+        }
+    },
+    "minimum-stability": "dev",
+    "require": {
+        "php": ">=7.0.0",
+        "psr/log": "^1.0",
+        "psr/simple-cache": "^1.0",
+        "guzzlehttp/guzzle": "^6.3"
+    }
+}