Need ApplicationUser to be added to database

Question

I am using code first migrations and trying to merge databases (default, and FlavorPingRebuild), and the ApplicationUser table is not being added to the merged DB. I am unsure of why the table is not being added.

namespace FlavorPingRebuild.Models
{
    public class FlavorPingRebuildContext : IdentityDbContext
    {
        public FlavorPingRebuildContext() : base("name=FlavorPingRebuildContext")
        {
        }

        public System.Data.Entity.DbSet<FlavorPingRebuild.Models.Merchant> Merchants { get; set; }

        public System.Data.Entity.DbSet<FlavorPingRebuild.Models.MenuItem> MenuItems { get; set; }

        public DbSet<IdentityUserLogin> UserLogins { get; set; }
        public DbSet<IdentityUserClaim> UserClaims { get; set; }
        public DbSet<IdentityUserRole> UserRoles { get; set; }
        public DbSet<ApplicationUser> ApplicationUsers { get; set; }

        protected override void OnModelCreating(DbModelBuilder builder)
        {
            //removes plural naming in DB tables
            builder.Conventions.Remove<PluralizingTableNameConvention>();

            //Removes cascade deletes.
            builder.Conventions.Remove<OneToManyCascadeDeleteConvention>();

            //When DB is created need to set up foreign key relationships.
            builder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
            builder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
            builder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });
        }
    }
}