Hello @Nicole Carbone
Welcome to the Atlassian Community!
Per your description, I understand you are trying to create a report that displays the issues resolved each day by user. Is that correct?
There are some dashboard gadgets that can provide you with that information, as the two-dimensional filter statistic gadget. This would be the steps to configure it:
resolved >= startOfDay()
The gadget will display all the issues resolved in the current day, grouping them by the assignee. P.S: You can change the filter to return that same information for any specific amount of time you want.
Let us know if you have any questions.