Solve problems Can I reset my user name and/or password using a security code? How can I change my username and password? How can I register a username and password? I forgot my username and/or password. What should I do? I have registered a username and password but have not received an activation e-mail. What should I do? I have registered via a local registration office. How will I receive my user name and password? I want to register a username and password but my e-mail address is already in use. What should I do? I want to register a username and password but my username is already in use. What should I do? If I have already set a user name and password for logging with security code via mobile app, SMS or Email, is it necessary to activate my username and password as a separate digital key? My user name and my password are blocked. What should I do? My user name has already been filled in. Can I change it? My username and password will soon expire. What should I do? The activation link to activate your username and password is valid for 5 days. Can I use the e-mail with this link afterwards? The reset link to change your user name and/or password is valid for 15 minutes. Can I use the e-mail with the reset link afterwards? What do I need to log in using my username and password? Why can't I log in with my username and password? Why do I have to enter my identification number and e-mail address to reset my user name and/or password? Why do I need to activate my username and password? Why do I need to renew my username and password?