diff --git a/src/userService.ts b/src/userService.ts
index 539016e..8d3f1df 100644
--- a/src/userService.ts
+++ b/src/userService.ts
@@ -77,9 +77,10 @@ export function parseUserProfile(
       typeof jwtPayload['custom:phone_number_verified'] === 'boolean'
         ? jwtPayload['custom:phone_number_verified']
         : undefined,
-    groups: Array.isArray(jwtPayload['custom:groups'])
-      ? jwtPayload['custom:groups']
-      : undefined,
+    groups:
+      typeof jwtPayload['custom:groups'] === 'string'
+        ? jwtPayload['custom:groups'].split(',').map((group) => group.trim())
+        : undefined,
   }
 
   if (