Fix typo in README.md

Author: taiki-t

README.md

@@ -58,7 +58,7 @@ Providers Setup
 ### Twitter
 - Create an app on https://apps.twitter.com
 - You can put any valid URL as the callback url.
-- Your configuration object should contain the 'Consumer Key (API Key)' as `appId`, the 'Consumer Secret' ass `appSecret` and the Twitter `App name` in the `callback`, eg
+- Your configuration object should contain the 'Consumer Key (API Key)' as `appId`, the 'Consumer Secret' as `appSecret` and the Twitter `App name` in the `callback`, eg
 ```js
 {
   appId: 'abc1234567890',
@@ -72,7 +72,7 @@ Providers Setup
 ### Tumblr
 - Create an app on https://www.tumblr.com/oauth/apps
 - You can put any valid URL as the callback url.
-- Your configuration object should contain the 'OAuth Consumer Key' as `appId`, the 'OAuth Consumer Secret' ass `appSecret` and any `callback`, eg
+- Your configuration object should contain the 'OAuth Consumer Key' as `appId`, the 'OAuth Consumer Secret' as `appSecret` and any `callback`, eg
 ```js
 {
   appId: '1234567890abc',