move composer file in root folder

public/API/composer.json → composer.json

@@ -2,5 +2,9 @@
     "require": {
         "aws/aws-sdk-php": "^3.181",
         "guzzlehttp/guzzle": "^7.0"
+    },
+    "config": {
+        "vendor-dir": "public/API/vendor"
     }
+
 }