Hey paddingtonbear9,
Welcome to the community and thanks for taking the time to post here on the forums.
When you registered with us you should have set a password with the team, did this not happen for you?
If you have access to your online account, you can set/change your password. Please login to your online account then Update settings >Account details and scroll down to the 'Telephone security details' section , if you click the edit button, you will then be able to set/change your password.
Please let me know if you're able to do this, if not, we will be able to help further from here
Kind Regards,
Steven_L