builder.Entity<Project>()
                .HasMany<ApplicationUser>(x => x.Users)
                .WithMany(x => x.Projects)
                .Map(m =>
                {
                    m.ToTable("UserToProject");
                    m.MapLeftKey("ProjectId");
                    m.MapRightKey("UserId");
                });

            builder.Entity<ApplicationUser>()
                .HasMany<ProjectTask>(x => x.ProjectTasks)
                .WithMany(x => x.Users)
                .Map(m =>
                {
                    m.ToTable("UserToTask");
                    m.MapLeftKey("UserId");
                    m.MapRightKey("TaskId");
                });