Now that we have our response models ready, we can connect them to the models behind them.

Create the models by following these steps:

1. Open UserResponse.swift and add the following function to the class:

init(user: User, addresses: [AddressResponse]? = nil) {
        self.id = user.id
        self.firstname = user.firstname
        self.lastname = user.lastname
        self.email = user.email
        self.addresses = addresses
    }

The function takes in a user and, optionally, addresses to assign them to its properties.

2. Now, include the following function in AddressResponse.swift:

init(_ address: Address) {
        self.id = address.id
        self.street = address.street
        self.city = address.city
        self.zip = address.zip
        self.userId = address.userId
        self.createdAt = address.createdAt
        self.updatedAt = address.updatedAt
        self.deletedAt = address.deletedAt
    }

The function takes an address and assigns its values to the response's values.

We have now created and connected all models, so let's start writing the controllers to make our service functional!