Adding some flag that tracks if this is creator's first signup or re-opt in

[dmtrjsg]

Context

• https://github.com/Joystream/atlas/issues/3449

Scope

Adding some flag that tracks if this is creator's first signup or re-opt in

┆Issue is synchronized with this Asana task by Unito

[dmtrjsg]

@zeeshanakram3 to confirm if the original date of sign up is not overwritten by repeat sign up.

[zeeshanakram3]

@zeeshanakram3 to confirm if the original date of sign up is not overwritten by repeat sign up.

Confirmed that original signup date is not overwritten when user re opt-in. So closing this issue