If you have previously completed Wraw, and are completing a new questionnaire you will need to select the login option on the registration screen, as you already have an account.
If you have forgotten your password you can easily reset it.
Click on the link that was shared with you to complete Wraw, select the login option from the registration screen.
On the login screen select the forgotten password link under the red sign in button.
On the next screen enter your email address and click the green request forgotten password button.
This will trigger a reset email to be sent to the specified email address.
Please ensure you check your junk & spam folders for the reset email.