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Hmmmm… a Coproduct store one of the given types or can store one of each????…. I mean given
`typealias LoginResponse = Coproduct4&lt;FatalLoginProblem, WrongCredentials, LoginNeedsMore, SuccessCompletedLogin&gt;`
a `LoginResponse` is only 1 of the 4 types or I should create `Unit` onto the useless.
PD: I think as we use `First(FatalLoginProblem())` the answer is it holds just 1, but I am not sure because of the fold syntax where I always should use all “branches” for the coproduct.