The entity type 'IdentityUserLogin<string>' requires a primary key tobe defined. If you intended to use a keyless entity type code example

Example: The entity type 'IdentityUserLogin' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
  base.OnModelCreating(modelBuilder);
}