credentials: let GetRequestMetadata() return nil when authToken isn't initialized.

cfc4n · chaochn47 · commit 0cf5a72c2abd · 2023-10-25T12:51:30.000-07:00
Signed-off-by: Chao Chen &lt;chaochn@amazon.com&gt;
diff --git a/clientv3/credentials/credentials.go b/clientv3/credentials/credentials.go
@@ -156,6 +156,9 @@ func (rc *perRPCCredential) GetRequestMetadata(ctx context.Context, s ...string)
 	rc.authTokenMu.RLock()
 	authToken := rc.authToken
 	rc.authTokenMu.RUnlock()
+	if authToken == "" {
+		return nil, nil
+	}
 	return map[string]string{rpctypes.TokenFieldNameGRPC: authToken}, nil
 }
 

Original file line number	Diff line number	Diff line change
`@@ -156,6 +156,9 @@ func (rc *perRPCCredential) GetRequestMetadata(ctx context.Context, s ...string)`
`156`	`156`	`rc.authTokenMu.RLock()`
`157`	`157`	`authToken := rc.authToken`
`158`	`158`	`rc.authTokenMu.RUnlock()`
	`159`	`+ if authToken == "" {`
	`160`	`+ return nil, nil`
	`161`	`+ }`
`159`	`162`	`return map[string]string{rpctypes.TokenFieldNameGRPC: authToken}, nil`
`160`	`163`	`}`
`161`	`164`