In case you forgot your password, you can reset it provided that you have your registered mobile phone number with you.
Select the Log in link from the Viva Wallet website.
Click the I forgot my password link and follow the instructions.
Enter the registered telephone number and select Reset Password
You will receive a 6 digit code to your registered telephone number,
You enter it as below and select Continue
You create a New Password and select Complete
You see the message for successful change: