(Bug) => last name value should be empty instead of "null"

[thomas-x-69]

I logged in as: "Thomas Ashraf" but when I opened the app my name was: first name = "Thomas Ashraf" last name = "Null" like this:

please solve this naming bug

[praveen-erramilli]

I found this bug during signup with Google profile. I fixed it in https://github.com/hcengineering/platform/pull/5328 But existing users need to rename their profile under settings