If they gave you an EUID and had you make a password just sign into greatpeople.me and click on My eSchedule at the top of the page and then the link that says Portal and submit an availability request. By the end of next week you should be getting your hours generated by eSchedule. Until then, or if My eSchedule link doesn't appear for you yet, either check your in-store schedule for hours or ask your manager. That's what I did.
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I thought people were joking when they said working for Kroger sucks...