Merge pull request #421 from ab-bh/patch-1

Removed extra syllables in API retrieval heading

Author: Matt Bernier

USAGE.md

@@ -321,7 +321,7 @@ print response.headers
 
 **This endpoint allows you to retrieve all API Keys that belong to the authenticated user.**
 
-The API Keys feature allows customers to be able to generate an API Key credential which can be used for authentication with the SendGrid v3 Web API or the [Mail API Endpoint](https://sendgrid.com/docs/API_Reference/Web_API/mail.html).
+The API Keys feature allows customers to generate an API Key credential which can be used for authentication with the SendGrid v3 Web API or the [Mail API Endpoint](https://sendgrid.com/docs/API_Reference/Web_API/mail.html).
 
 ### GET /api_keys