How can I change the table names when using ASP.NET Identity?

You can do this easily by modifying the IdentityModel.cs as per the below:

Override OnModelCreating in your DbContext then add the following, this will change AspNetUser table to “Users” you can also change the field names the default Id column will become User_Id.

modelBuilder.Entity<IdentityUser>()
                    .ToTable("Users", "dbo").Property(p => p.Id).HasColumnName("User_Id");

or simply the below if you want to keep all the standard column names:

modelBuilder.Entity<IdentityUser>()
                        .ToTable("Users", "dbo")

Full example below (this should be in your IdentityModel.cs file) i changed my ApplicationUser class to be called User.

public class User : IdentityUser
    {
        public string PasswordOld { get; set; }
        public DateTime DateCreated { get; set; }

        public bool Activated { get; set; }

        public bool UserRole { get; set; }

    }

public class ApplicationDbContext : IdentityDbContext<User>
    {
        public ApplicationDbContext()
            : base("DefaultConnection")
        {
        }

        protected override void OnModelCreating(System.Data.Entity.DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.Entity<IdentityUser>()
                .ToTable("Users", "dbo").Property(p => p.Id).HasColumnName("User_Id");
            modelBuilder.Entity<User>()
                .ToTable("Users", "dbo").Property(p => p.Id).HasColumnName("User_Id");
        }
    }

Please note i have not managed to get this working if the current table exists. Also note whatever columns you do not map the default ones will be created.

Hope that helps.