Steps:
To sign in, in Classtra, open Classtra's official website www.Classtra.org.
Click on the sign-in button from the top.
A sign-in form will appear.
Click on the reset password.
Type your email address.
Hit the “send reset link”.
You will receive a link to reset your password if your email exists. Check your junk/spam mail if you don't see the email.