Stuck Shift Key, and can't type the "login" keychain password

Hello everyone. First of all, I would like to apologize for creating a topic that has already been answered, well a part of it. Basically, I sent my macbook pro to apple and they said they need to change my keyboard bc of the water spillage. Anyway, my shift key is stuck and I changed my keychain password to install the Keymapper application to disable the key. Here is the problem, in order to install the application, I have to put my newly reset keychain password called "login". Because of the shift key, all the letters are caps locked and I can't type the password since its lower.

I have an external keyboard at my place and tried to type there, but sadly it was still all capital. What i'm asking here is, how can i type the password so that It will not be in capital? I just want to install the app and that's all. Without entering the keychain password, i can't do anything.

Thank you very much for your help.

Sincerely,

Burke Akcakil