Meanwhile, i installed version Pike instead Queens. But this answer really helped. Thanks.

The process to get a token is the same on Queens as any earlier OpenStack version (within reason).

There are, however, two Keystone API versions; the approach taken by v2 is much simpler than v3, but you are more likely to encounter v3, no matter which OpenStack version you have.

Definitely use v3 if available. Not only is v2 going away, it suffers from some security issues...

I use the commandopenstack token issue, still repsonses 401 Unauthorised.Why! How can trouble shooting.

I would start looking for errors in the Keystone and Gnocchi logs, and checking the Gnocchi authentication configuration. If you see nothing in the Keystone logs, your Gnocchi authentication config may reference an incorrect Keystone endpoint, and you should see relevant errors in the Gnocchi log.