Hello,
Good day! Thank you for contacting Microsoft Customer Service.
I understand that you have issues logging in to your account because it's prompting you with a security measure, I do apologize for this inconvenience.
I know that this may seem to be a pain, but we take protecting customer information very seriously. That is why Microsoft is asking customers to verify their accounts. We want to make sure it is only you that is trying to get access to that. Don't worry after you successfully verified your account you can use your account normally again.
To assist you better I have searched for additional resource for you to get this code successfully. For a step by step instruction about this process, please visit this link: