fix: Cookies.set does not stringify JSON (#8807)

* fix: cookie setting

* chore: remove debug statement

* chore: add specs to test stringify

app/javascript/dashboard/store/utils/api.js

@@ -27,7 +27,7 @@ export const getHeaderExpiry = response =>
 
 export const setAuthCredentials = response => {
   const expiryDate = getHeaderExpiry(response);
-  Cookies.set('cw_d_session_info', response.headers, {
+  Cookies.set('cw_d_session_info', JSON.stringify(response.headers), {
     expires: differenceInDays(expiryDate, new Date()),
   });
   setUser(response.data.data, expiryDate);