Unlock GPGS certs cache in social client.

Author: novabyte

CHANGELOG.md

@@ -7,6 +7,7 @@ The format is based on [keep a changelog](http://keepachangelog.com) and this pr
 ### Fixed
 - Set gateway timeout to match idle timeout value.
 - Reliably release database resources before moving from one query to the next.
+- Unlock GPGS certs cache in social client.
 
 ## [2.3.1] - 2019-01-04
 ### Added

social/social.go

@@ -267,10 +267,10 @@ func (c *Client) CheckGoogleToken(ctx context.Context, idToken string) (*GoogleP
 			break
 		}
 	}
+	c.RUnlock()
 
 	// All verification attempts failed.
 	if token == nil {
-		c.RUnlock()
 		return nil, errors.New("google id token invalid")
 	}