When creating an account through the Minecraft client when starting the mod for the first time I have filled in a 64 character password (using KeePass to store passwords so why not use proper ones). Creating the account went fine and the client logged in, however when I tried to login to the website with the saved password it said that the password was incorrect.
A problem I encountered on a couple other sites/services is that the filled in password is (silently) truncated before saving to the database, and therefore the password is incorrect.
With the "Forgot password" link I have recovered my account, so there is no immediate problem, but it would be nice if this issue could be looked into (in my opinion there should not be a limit on password length, or at least one that is stupidly high).
The password is not being silently truncated, the input field in-game only accepts up to 30 characters, which is truncated when pasting the password.
I will however change this in a future version to disallow passwords longer than 30 characters by increasing the text input's max length and showing an error message, if that's good. Alternatively, I could raise the max password length to 128, if that's any better.