User UpdateUser(
	User user,
	CloudIdentity identity = null
)

Function UpdateUser ( 
	user As User,
	Optional identity As CloudIdentity = Nothing
) As User

User^ UpdateUser(
	User^ user, 
	CloudIdentity^ identity = nullptr
)

abstract UpdateUser : 
        user : User * 
        ?identity : CloudIdentity 
(* Defaults:
        let _identity = defaultArg identity null
*)
-> User 

User user = provider.GetUserByName("{username}", null);
user.Username = "{newUsername}";
provider.UpdateUser(user, null);

Dim user = provider.GetUserByName("{username}", Nothing)
user.Username = "{newUsername}"
provider.UpdateUser(user, Nothing)

auto user = provider->GetUserByName("{username}", nullptr);
user->Username = "{newUsername}";
provider->UpdateUser(user, nullptr);

let user = provider.GetUserByName("{username}", null)
user.Username <- "{newUsername}"
provider.UpdateUser(user, null) |> ignore