root@gitlab:/# gitlab-psql
    psql (9.6.8)
    Type "help" for help.

    gitlabhq_production=#
    gitlabhq_production=# select a.name,a.username,b.fingerprint
from users a, keys b where a.id=b.user_id;

         name      | username |                   fingerprint
    ---------------+----------+-------------------------------------------------
     Administrator | root     | f4:cc:ec:76:d0:1c:86:1d:45:6d:a7:6e:b3:df:32:7c
    (1 row)