Verify for crew? Or are you trying to use /register?
For registration
Account woes: How do I login?
Do /register password (the password being one you choose and keep private) in /rift and read the error message it gives.
If it says:
“You do not have permission to use this command”
Then you are already logged in. You can see you are a member when you chat: you have blue text and a title of [Member]
“You already have an account called “PlayerName”, use the that to login.”
Then use /rename to rename yourself to that name or login with a character that has the exact same name
"Your name “NameOfYourCharacter” has already been used by someone [else] to register.
You can change your name or login if you were the one to register it.
To change your name type /rename “your new name” "
Once you do that and register, you can login to it in the future by using /login “your new name” “your password” " then do as the message says
Successfully registered account “Your name”
Then do /login password (the one your used to register)
Note: /rename currently cannot be used. Make a new character with the desired name.
If it is something else like getting crew, check the link below
https://dark-gaming.com/thread/a-lot-of-faq-info-and-links-for-reference.2967#23981