Show colored UI avatars for new users

[isVivek99]

What is to be done ?
Changed ui-avatars of new members

• STEP 1 - add color_id for existing users PR Feature/one time user colors #735
• STEP 2 - add color_id for new users Issue add color_id to old users #1406

current view

expected with the help of backend

expected outcome

1. colors remain consistent across requests for every user