In [a previous PR](https://github.com/twentyhq/twenty/pull/11023) I
fixed the issue where users where re-assigned the default role when
signin up using SSO.
The "fix" actually introduced another error, calling
`assignRoleToUserWorkspace` only when a user is signing up to twenty,
forgetting about the case where an existing twenty user signs up to a
different workspace. They should still be assigned the role in that
case.
To fix this and improve clarity, I moved assignRoleToUserWorkspace to
addUserToWorkspace and renamed addUserToWorkspace to
addUserToWorkspaceIfUserNotInWorkspace since this is at each sign in but
does nothing if user is already in the workspace.
I think ideally we should refactor this part to improve readability and
understandability, maybe with different flows for each case: signIn and
signUp, to twenty or to a workspace
8b7188e85b