I'm sorry to hear that you're having trouble logging in to player to get the server password for Trackmania. Here are a few things you can try to resolve the issue:
Double-check your login credentials. Make sure that you are entering your username and password correctly. If you are unsure, try resetting your password to see if that resolves the issue.
Try using a different web browser. Sometimes issues with logging in can be caused by the web browser you are using. Try using a different browser, such as Chrome, Firefox, or Edge, to see if that helps.
Clear your web browser's cache and cookies. Sometimes issues with logging in can be caused by corrupted or outdated cache and cookies. Clearing them can often resolve the issue.