If you have created your account via the Immutable Passport, then there is no password. All you need to do is put in the email that you used for signing up and then use the verification code to log in. 

If you click on the red 'Continue with IMX Passport' button on the Log In screen, a dialog box would open up. Here you will add the email address you have used to create you ME account. 

A verification email will be the sent to your email ID, where you will recieve a code that you can use to log in. 

For players who initally signed up to the game by creating an account, and have forgotten the password, the account recovery process would be as following: 

Click on 'Forgot Password' on the log in screen

2. Confirm that this is your account, and enter the email you used for the previous registration.  After, click on the "Send Resent Email" button.  

3. Check your email for the verification link and click on the link to reset your password. 

4. You can then set a strong password that you have not used before.