ef code first - OnModelCreating fails when Context inherits from IdentityDbContext -

i had data access implemented below , working

1. contexct inheriting db context
2. had onmodelcreating configurations
3. manually addding configurations

however modified context inherit identitydbcontext<applicationuser> , stopped manually generating configurations , after onmodelcreating fails , db updates not happening @ all.

if remove onmodelcreating, works fine. run application.

can 1 guide me whats going wrong here?

i missing below line in onmodelcreating method override. after started working.

base.onmodelcreating(modelbuilder);