Domains registered with Tucows are managed through Hover.com. They would have sent the login and password information to the email address on your NameJet account. Please check your spam/bulk mail filters, just in case it was not properly delivered to you.
As NameJet is an auction site only, you will need to contact the sponsoring registrar directly to obtain the account and password if you are unable to locate that email. Each registrar sends an email once they have created the account for you, and we do not have the ability to resend their emails or access your account information in their database.
You should be able to retrieve the login credentials from here: https://www.hover.com/signin
In the FORGOT USERNAME field, please enter the email address associated with your NameJet account to receive the username via email. Once you have the user ID, you can reset the password from the same page.
If you need any additional assistance accessing the domain, you can contact Hover directly: https://help.hover.com/hc/en-us