oem unlocking greyed out

hi, i bought a oneplus 8 5g from sprint today and i am trying to root it before i load my stuff to it (the bootloader menu mentions its product name is kona).

when i go to developer options, i am able to turn on usb debugging but oem unlocking is greyed out.

Code:[root@hyper ~]# adb reboot bootloadershows Quote:

...secure boot - yes device state - locked

on the fone.Code:[root@hyper ~]# fastboot flashing unlock
FAILED (remote: 'Flashing Unlock is not allowed
')
Finished. Total time: 0.001s
[root@hyper ~]# fastboot oem unlock
FAILED (remote: 'Flashing Unlock is not allowed
')
Finished. Total time: 0.001s