Actual Behaviour
Currently, Email of a user is shown in the app.
Expected Behaviour
If a user saves his/her user name then the user name should be shown in the app otherwise the email by default.
Steps to reproduce it
After setting the user name, store that user name in a buffer and retrieve wherever applicable.
Screenshots of the issue

Blocker for the issue
Issue #544
Would you like to work on the issue?
Yes.