How do I log in if I logged out of the app?

Edited

1. Open the app and click on the 'I already have an account' button on the first screen of the app as shown below:

 

log_in.png

2. Enter your account details:

 Email: your account email

password: the password you set

credentials.png

Then click the 'Log in' button to log into your account.

The app should let you in and show the 'Diary' screen.