Actually set user on input change

components/GameModManagementModal.tsx

@@ -143,7 +143,11 @@ export default function (props: { isOpen: boolean; onClose: () => void }) {
             </Table>
           </TableContainer>
           <HStack mt="8px">
-            <Input maxLength={19} placeholder="1234567890987654321" />
+            <Input
+              maxLength={19}
+              onChange={(e) => setUserToAdd(e.target.value)}
+              placeholder="1234567890987654321"
+            />
             <Button ml="8px" onClick={async () => await addUser(userToAdd)}>
               Add
             </Button>