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? 本電子郵件及其所有附件所含之資訊均屬機密，僅供指定之收件人使用，未經寄件人同意不得揭露、複製或散布本電子郵件。若您並非指定之收件人，請勿使用、保存或揭露本電子郵件之任何部分，並請立即通知寄件人並完全刪除本電子郵件。網路通訊可能含有病毒，收件人應自行確認本郵件是否安全，若因此造成損害，寄件人恕不負責。 The information contained in this communication and attachment is confidential and is intended only for the use of the recipient to which this communication is addressed. Any disclosure, copying or distribution of this communication without the sender's consents is strictly prohibited. If you are not the intended recipient, please notify the sender and delete this communication entirely without using, retaining, or disclosing any of its contents. Internet communications cannot be guaranteed to be virus-free. The recipient is responsible for ensuring that this communication is virus free and the sender accepts no liability for any damages caused by virus transmitted by this communication.