Handle rejected promises

Author: tmcw

src/utils/callcallback.js

@@ -5,10 +5,14 @@
 
 export default function callCallback(promise, callback) {
   if (callback) {
-    promise.then((result) => {
-      callback(undefined, result);
-      return result;
-    });
+    promise
+      .then(result => {
+        callback(undefined, result);
+        return result;
+      })
+      .catch(error => {
+        callback(error);
+      });
   }
   return promise;
 }