Tap on the RAYVN app.
If you are logging in for the first time, you will be asked to enter your RAYVN username and password. You should have received your login details in an email when your administrator created your RAYVN user.
Type your username (usually your email), and the password, and click "log in".
If you for some reason are unable to log in, you can reset your password. If you do this, you will receive an email with a link that you can click, which will let you define a new password. When you have defined a new password, you can try to log in to your mobile app again.