Default username and password of both CPE and ACS server

hi guys,
what is the default username and password of the CPE and ACS server.

in my CPE configuration file i have given these values

acs_url=http://127.0.0.1:7547/
#ca_file=/etc/ssl/private/ca.pem
#ca_password=121111
cpe_manufacture=ChinaNMS
cpe_oui=A00001
cpe_sn=12345
cpe_name=000000
cpe_pc=OT2800
cpe_specver=V1.0
cpe_hwver=V1.0
cpe_version=V1.2.7.29
cpe_username=cwmp
cpe_password=cwmp
acs_username=cwmp
acs_password=cwmp

iam getting response as => HTTP/1.1 400 Bad Request
is error related to username and password or anything else??thank you

The default configuration has no CPE to ACS authentication active.

http://docs.genieacs.com/en/latest/cpe-authentication.html#cpe-to-acs

hi ,i have tried with different configuration still it is showing the same thing (400 bad request)

my configuration file=>

[cwmp]
enable=1;
soap_env=SOAP-ENV
soap_enc=SOAP-ENC
acs_auth=0
cpe_auth=0
event_filename=/etc/cwmpevent.bin

acs_url=http://127.0.0.1:7547/
#acs_url=http://192.168.28.246:9999/
ca_file=/etc/ssl/private/ca.pem
ca_password=123456

cpe_manufacture=ChinaNMS
cpe_oui=A00001
cpe_sn=300000
cpe_name=000000
cpe_pc=OT2800
cpe_specver=V1.0
cpe_hwver=V1.0
cpe_version=V1.2.7.29
cpe_username=
cpe_password=
acs_username=
acs_password=
[cwmpd]
httpd_port=5400
http_timeout=-1