You will need to reset your Autodesk account password. Click the Forgot? in the sign in dialog for Autodesk (pictured below) to request a password reset for login purposes. You should receive an email with a link that will take you to the Autodesk account management site, and you can reset your password there.
Knowledgebase
Browse by Topic
General topics
Account help
Tinkercad editor
3D printing
Kids and EDU
Account migration
Still require assistance?
Open a support ticket