Update generic API example as well

1 files changed, 23 insertions, 4 deletions

diff --git a/README.md b/README.md
index 5355470..1f62f26 100644
--- a/README.md
+++ b/README.md
@@ -155,10 +155,29 @@ sg.API(request, function(error, response) {
 var sg = require('sendgrid')(process.env.SENDGRID_API_KEY)
 
 // GET Collection
-var request = sg.emptyRequest()
-request.method = 'GET'
-request.path = '/v3/api_keys'
-sg.API(request, function (error, response) {
+var request = sg.emptyRequest({
+  method: 'GET',
+  path: '/v3/api_keys'
+});
+
+//With promise
+sg.API(request)
+  .then(response => {
+    console.log(response.statusCode)
+    console.log(response.body)
+    console.log(response.headers)
+  })
+  .catch(error => {
+    //error is an instance of SendGridError
+    //The full response is attached to error.response
+    console.log(error.response.statusCode);
+  });
+
+//With callback
+sg.API(request, function(error, response) {
+  if (error) {
+    console.log('Error response received');
+  }
   console.log(response.statusCode)
   console.log(response.body)
   console.log(response.headers)