I hope that you are doing well.
Indeed, I have been facing a problem in receiving the collected data by my colleagues for some days.
When I share with them the collect data link (Enketo Express for KoboToolbox), they will be asked to enter user and password as in the following picture.
Kindly, support me to resolve this problem.
Welcome to the community, @engrnashwan! This post discussed previously should help you solve your issue: