Dears:

I can get user list with project in openstack version caracal.

# openstack project list -f value
7fb2be327b4c4f9e83db04a4b5cb922b service
c1bcb532eca44aadabb028b1ee715412 admin
de4012f880e7408f9fb21b67930c21ac project_it

# openstack user list -f value
84b39214b13148d68bf88242aa6abdf9 admin
62f7113645c24199a9946cd16911ca64 glance
b21da7173fe3400f91d3eb73f392474d nova
95a6ff7b9bba42f9aadf3b07a0811330 placement
4ac268a8e75b4a4288f067e28ad14425 neutron
46fa578d54624e06ae2e0b3761a67de7 cinder
1c1646579b5042a6bb463e8f46b7762f test001
57689f8310e744889dce33d6b32f4524 test002


# openstack user list -f value --project project_it
1c1646579b5042a6bb463e8f46b7762f test001
57689f8310e744889dce33d6b32f4524 test002

# openstack user list -f value --project service
4ac268a8e75b4a4288f067e28ad14425 neutron
46fa578d54624e06ae2e0b3761a67de7 cinder
b21da7173fe3400f91d3eb73f392474d nova
62f7113645c24199a9946cd16911ca64 glance
95a6ff7b9bba42f9aadf3b07a0811330 placement

# dpkg -l| grep keyston
ii keystone 2:25.0.0-0ubuntu1 all OpenStack identity service - Daemons
ii keystone-common 2:25.0.0-0ubuntu1 all OpenStack identity service - Common files
ii python3-keystone 2:25.0.0-0ubuntu1 all OpenStack identity service - Python 3 library
ii python3-keystoneauth1 5.6.0-0ubuntu1.1 all authentication library for OpenStack Identity - Python 3.x
ii python3-keystoneclient 1:5.4.0-0ubuntu1 all client library for the OpenStack Keystone API - Python 3.x
ii python3-keystonemiddleware 10.6.0-0ubuntu1 all Middleware for OpenStack Identity (Keystone) - Python 3.x


But I can not get user list in epoxy version.

# openstack project list -f value
0087125cb3564da39a5e87dc61aece78 project_it
8b6a848d2d7841118567f1dad2eeb9f5 admin
dcaa69462fd3447ca75133a8ce4b95c3 service

# openstack user list -f value
27bd419eb7bc4da58f9e246232a12720 placement
7c5a457f461440e5a24a368f827ecafc admin
846cca4cb4394d1ab4e8d95dffb63ce2 glance
92122f012abb4db38a0d3ca287c04122 nova
ad039b4d1f4f4c42a59e69e56eef4f16 neutron
ebde13fec7584f5180becb88afa0e1c7 cinder
f4cf0b16f52e407d994e2aa729936580 test002
f9ee38a0a4cb412dbd293a83b5b32dc5 test001


# openstack user list -f value --project project_it
Either group or user should be specified

# openstack user list -f value --project service
Either group or user should be specified


What do I miss?
I need to read which one document?






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