Merge pull request #48464 from wanghaoran1988/fix_err_type

Automatic merge from submit-queue (batch tested with PRs 47700, 48464, 48502)

fix error type

**What this PR does / why we need it**:
invalidToken should be errInvalideToken
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:
No
**Release note**:
```
None
```

staging/src/k8s.io/apiserver/pkg/authentication/request/websocket/protocol.go

@@ -33,7 +33,7 @@ const bearerProtocolPrefix = "base64url.bearer.authorization.k8s.io."
 
 var protocolHeader = textproto.CanonicalMIMEHeaderKey("Sec-WebSocket-Protocol")
 
-var invalidToken = errors.New("invalid bearer token")
+var errInvalidToken = errors.New("invalid bearer token")
 
 // ProtocolAuthenticator allows a websocket connection to provide a bearer token as a subprotocol
 // in the format "base64url.bearer.authorization.<base64url-without-padding(bearer-token)>"
@@ -102,7 +102,7 @@ func (a *ProtocolAuthenticator) AuthenticateRequest(req *http.Request) (user.Inf
 
 	// If the token authenticator didn't error, provide a default error
 	if !ok && err == nil {
-		err = invalidToken
+		err = errInvalidToken
 	}
 
 	return user, ok, err

staging/src/k8s.io/apiserver/pkg/authentication/request/websocket/protocol_test.go

@@ -59,8 +59,8 @@ func TestAuthenticateRequestTokenInvalid(t *testing.T) {
 	if ok || user != nil {
 		t.Errorf("expected not authenticated user")
 	}
-	if err != invalidToken {
-		t.Errorf("expected invalidToken error, got %v", err)
+	if err != errInvalidToken {
+		t.Errorf("expected errInvalidToken error, got %v", err)
 	}
 }