Merge pull request #6604 from segmentio/longstoryshort-patch-1

Update index.md

Author: forstisabella

src/connections/sources/catalog/libraries/server/http-api/index.md

@@ -40,6 +40,10 @@ In practice that means taking a Segment source **Write Key**,`'abc123'`, as the
 > Include a colon before encoding. While encoding the write key without a colon might work due to backward compatibility, this won't always be the case.  
 
 #### OAuth
+
+> info ""
+> OAuth 2.0 is currently in private beta and is governed by Segment’s [First Access and Beta Preview Terms](https://www.twilio.com/en-us/legal/tos){:target="_blank"}.
+
 [Obtain the access token](/docs/connections/oauth/) from the Authorization Server specific to the region. 
 
 Include the access token in the Authorization header as a Bearer token along with your project's write key in the payload of the request. For example, Authorization with Bearer token looks like: