this.HasMany(t => t.Recepten).WithMany(r => r.users).Map(m =>
            {
                m.ToTable("user_has_recepten");
                m.MapLeftKey("user_uid");
                m.MapRightKey("recepten_receptId");
            });

           this.HasMany(t => t.Favorieten).WithMany(r => r.users).Map(m =>
           {
               m.ToTable("user_has_fav_recepten");
               m.MapLeftKey("user_uid");
               m.MapRightKey("recepten_receptId");
           });