Powering Le Potato while flashing eMMC

I am hoping there are still some active people on here that might be able to shed some light on something that I cannot find documented anywhere.  When flashing an eMMC module with the Le Potato I know to use the included USB A to USB A cable, which port to use and to hold the uboot button.  This all works fine, but I am seeing the error message "low power" while flashing when the flash process fails (which it does 90% of the time).  The USB A to A cable is connected to a powered USB 3.1 hub which is powered by a 3 amp supply.  What I am NOT doing, and need to know if I can or should, is I am not connecting power to the micro USB port.  Is it safe to do connect the micro USB?  Am I supposed to?
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