Gitlab uses the linux (aviary) password for LDAP authentication.
If you are having issues logging into gitlab, first make sure to ssh into aviary.cs.umanitoba.ca to ensure you do not need to reset your linux password, otherwise it will prevent you from logging into code.cs.umanitoba.ca.
Instructions on how to reset your password: https://home.cs.umanitoba.ca/~csupport/facilities-guide/#!unix/access.md#Initial_Password_and_Password_Changes