diff --git a/lib/config.js b/lib/config.js
index eaef014..7d50af0 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -32,15 +32,14 @@ function validateConfig(config) {
 
   const hasApiKeys = Array.isArray(config.apiKeys) && config.apiKeys.length > 0;
   const hasSvcAccounts = Array.isArray(config.serviceAccounts) && config.serviceAccounts.length > 0;
-  const hasCredPath = !!config.credentialsPath;
 
   // Do not allow both API keys and service accounts to be present simultaneously
   if (hasApiKeys && hasSvcAccounts) {
     throw new Error('Configuration must not include both `apiKeys` and `serviceAccounts`; choose one authentication method');
   }
 
-  if (!hasApiKeys && !hasSvcAccounts && !hasCredPath) {
-    throw new Error('Configuration must include at least one of: `apiKeys`, `serviceAccounts`, or `credentialsPath`');
+  if (!hasApiKeys && !hasSvcAccounts) {
+    throw new Error('Configuration must include at least one `apiKeys` or `serviceAccounts`');
   }
 
   // Basic validation of documents/sheets structure