$ python cr50_rma_open.py -g -i "BOB E25-A6A-A7I-E9Q-A4R"
Running cr50_rma_open version 2
SERIALNAME: 02034029-90EBD060
DEVID: 0x02034029 0x90ebd060
testing /dev/ttyUSB0
sysinfo
Reset flags: 0x00000800 (hard)
Reset count: 0
Chip:        g cr50 B2-C
RO keyid:    0xaa66150f(prod)
RW keyid:    0xde88588d(prod)
DEV_ID:      0x02034029 0x90ebd060
Rollback:    2/2/2

found device /dev/ttyUSB0
DEVICE: /dev/ttyUSB0
RMA support added in: 0.3.3
Running Cr50 Version: 0.3.4
RLZ: ASUO
Cr50 setup ok
ccd: Restricted
wp: enabled
rma_auth output:
rma_auth

 ABXFG CMDAD UJFPQ 7J8MQ
 UUSTG XGTRT VJ6Z5 48PWC
 8AGMG T2QJ4 BT3TW 4HJVU
 4XLPA SB4GE 78RSB KYEHC
RLZ: ASUO
CHALLENGE: ABXFGCMDADUJFPQ7J8MQUUSTGXGTRTVJ6Z548PWC8AGMGT2QJ4BT3TW4HJVU4XLPASB4GE78RSBKYEHC
HWID:BOB E25-A6A-A7I-E9Q-A4R
GOTO:
https://www.google.com/chromeos/partner/console/cr50reset?challenge=ABXFGCMDADUJFPQ7J8MQUUSTGXGTRTVJ6Z548PWC8AGMGT2QJ4BT3TW4HJVU4XLPASB4GE78RSBKYEHC&hwid=BOB 
E25-A6A-A7I-E9Q-A4R
If the server fails to debug the challenge make sure the RLZ is 
whitelisted

---------

but going to the page gives a gmail login prompt. if using a generic one, result is:


Failed to start authentication.