EGS login fails with complex password

[LoneBoco]

Describe the bug
You are unable to log into your EGS account if your password contains special characters. I had a 32-digit password with the special characters ,&#"; and a TOTP 2FA set on my account. I went through the login process like normal and it claimed I logged in, but I would not see any of my games on my account.

I went to the logs and looked at my epiclogin.log and saw this:

** (process:12198): WARNING **: 00:16:35.889: Error writing credentials to socket: Error sending message: Broken pipe

I've had issues with 3rd party services before where a complicated password isn't sent correctly, so I tried changing my password to a 20 character alphanumeric password to check. I went through the whole process again and this time I was able to see my games; the error went away. It does seem to indicate an issue encoding the password.

To Reproduce
Steps to reproduce the behavior:

1. Set a password on your EGS account that has a bunch of special characters.
2. Try to log into your account.
3. ???
4. You are logged in but have no games.

Expected behavior
I expected to be able to log in and see my games.

Handheld device (please complete the following information):

• Device: Steam Deck
• OS: SteamOS
• Version: 3.5.19 (stable)

[ebenbruyns]

I think you should log this issue on the legendary repo instead. I don't maintain legendary where this issue occurs. I'll leave this open for the mean time because I might have to patch it if it doesn't get fixed.

That's some good bug hunting though!