if you using @JsonIgnore resultList can't make items.

    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(
            name = "usuario_vivienda",
            joinColumns = @JoinColumn(name = "usuario_id"),
            inverseJoinColumns = @JoinColumn(name = "vivienda_id")
    )
    @JsonIgnore
    private Set<Vivienda> viviendas;

but this @JsonIgnore remove will cause recursive error. because you includes Viviendas has Usuarios list(set) and Usuarios has Viviendas list(set).

so if you want solve this; make another table and that table has two Class.