Assuming you you are referring to the RealtyZapp.com site and you know your username (email address) then you can just click on the Forgot Password? link. Enter in your account's email address and click on the send button.
We will send you an emaiil with a link to reset your password. Find the email and click on the link. Enter a new password, verify it and click the button. If successful, you can then go to the login in page and use your new password to log in.
If you forgot your username (email address) then you will have to contact us at email@example.com and we will help you.
If you forgot your password to log into Talk RealtyZapp.com, it a similar procedure to the one above. You click on the Forgot your password? link and then provide the email address you used when registering on Talk RealtyZapp.com.