apply feedback

Signed-off-by: Jorge Turrado <[email protected]>

Author: JorTurFer

examples/authentication/authentication.go

@@ -14,7 +14,8 @@ func main() {
 
 	// When creating a new API client without providing any configuration, it will setup default authentication.
 	// The SDK will search for a valid service account key or token in several locations.
-	// It will first try to use the key flow, by looking into the variables STACKIT_SERVICE_ACCOUNT_KEY, STACKIT_SERVICE_ACCOUNT_KEY_PATH,
+	// It will first try to use the workload identity federation flow by looking into the variables STACKIT_FEDERATED_TOKEN_FILE, STACKIT_SERVICE_ACCOUNT_EMAIL and their default values,
+	// Then, it will try key flow, by looking into the variables STACKIT_SERVICE_ACCOUNT_KEY, STACKIT_SERVICE_ACCOUNT_KEY_PATH,
 	// STACKIT_PRIVATE_KEY and STACKIT_PRIVATE_KEY_PATH. If the keys cannot be retrieved, it will check the credentials file located in STACKIT_CREDENTIALS_PATH, if specified, or in
 	// $HOME/.stackit/credentials.json as a fallback. If the key are found and are valid, the KeyAuth flow is used.
 	// If the key flow cannot be used, it will try to find a token in the STACKIT_SERVICE_ACCOUNT_TOKEN. If not present, it will