diff --git a/lib/start-proxy-action.js b/lib/start-proxy-action.js
index 9553ff720..9ca4c44d7 100644
--- a/lib/start-proxy-action.js
+++ b/lib/start-proxy-action.js
@@ -121409,10 +121409,13 @@ function credentialToStr(credential) {
     appendIfDefined("Username", credential.username);
   }
   if ("password" in credential) {
-    appendIfDefined("Password", credential.password ? "***" : void 0);
+    appendIfDefined(
+      "Password",
+      isDefined2(credential.password) ? "***" : void 0
+    );
   }
   if (isToken(credential)) {
-    appendIfDefined("Token", credential.token ? "***" : void 0);
+    appendIfDefined("Token", isDefined2(credential.token) ? "***" : void 0);
   }
   if (isAzureConfig(credential)) {
     appendIfDefined("Tenant", credential.tenant_id);
diff --git a/src/start-proxy/types.ts b/src/start-proxy/types.ts
index 0efed8a04..f60e0f64f 100644
--- a/src/start-proxy/types.ts
+++ b/src/start-proxy/types.ts
@@ -143,10 +143,13 @@ export function credentialToStr(credential: Credential): string {
   }
 
   if ("password" in credential) {
-    appendIfDefined("Password", credential.password ? "***" : undefined);
+    appendIfDefined(
+      "Password",
+      isDefined(credential.password) ? "***" : undefined,
+    );
   }
   if (isToken(credential)) {
-    appendIfDefined("Token", credential.token ? "***" : undefined);
+    appendIfDefined("Token", isDefined(credential.token) ? "***" : undefined);
   }
 
   if (isAzureConfig(credential)) {