reworked api example page

package.json

@@ -46,7 +46,8 @@
     "passport": "^0.4.0",
     "passport-local": "^1.0.0",
     "pug": "^2.0.0-rc.4",
-    "request": "^2.83.0"
+    "request": "^2.83.0",
+    "request-promise": "^4.2.2"
   },
   "devDependencies": {
     "@types/async": "^2.0.45",
@@ -70,6 +71,7 @@
     "@types/passport": "^0.3.3",
     "@types/passport-facebook": "^2.1.3",
     "@types/request": "^2.0.9",
+    "@types/request-promise": "^4.1.39",
     "@types/supertest": "^2.0.4",
     "@types/shelljs": "^0.7.7",
     "chai": "^4.1.2",