Revert "Do not set header X-Goog-User-Project header for the resource google_client_openid_userinfo"

.changelog/7112.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google-beta/transport.go

@@ -48,9 +48,7 @@ func sendRequestWithTimeout(config *Config, method, project, rawurl, userAgent s
 	reqHeaders.Set("User-Agent", userAgent)
 	reqHeaders.Set("Content-Type", "application/json")
 
-	if !config.UserProjectOverride {
-		reqHeaders.Set("X-Goog-User-Project", "")
-	} else if config.UserProjectOverride && project != "" {
+	if config.UserProjectOverride && project != "" {
 		// Pass the project into this fn instead of parsing it from the URL because
 		// both project names and URLs can have colons in them.
 		reqHeaders.Set("X-Goog-User-Project", project)

google-beta/utils.go

@@ -514,17 +514,9 @@ func multiEnvSearch(ks []string) string {
 }
 
 func GetCurrentUserEmail(config *Config, userAgent string) (string, error) {
-	// When environment variables UserProjectOverride and BillingProject are set for the provider, the header X-Goog-User-Project is set for the API requests.
-	// But it causes an error when calling GetCurrentUserEmail. It makes sense to not set header X-Goog-User-Project by setting UserProjectOverride
-	// to false when calling GetCurrentUserEmail, because it does not create a bill.
-	origUserProjectOverride := config.UserProjectOverride
-	config.UserProjectOverride = false
-
 	// See https://github.com/golang/oauth2/issues/306 for a recommendation to do this from a Go maintainer
 	// URL retrieved from https://accounts.google.com/.well-known/openid-configuration
 	res, err := sendRequest(config, "GET", "", "https://openidconnect.googleapis.com/v1/userinfo", userAgent, nil)
-	config.UserProjectOverride = origUserProjectOverride
-
 	if err != nil {
 		return "", fmt.Errorf("error retrieving userinfo for your provider credentials. have you enabled the 'https://www.googleapis.com/auth/userinfo.email' scope? error: %s", err)
 	}