fix: (#57) fix import file snake_case from gennerated file

[tnexlor]

Fixes #57

Proposed Changes

• Fix import statement for file snake_case
  Example

Before:

import { StartupSource } from './userfriends'

After:

import { StartupSource } from './user_friends'

[tnexlor]

@kimjbstar Could you please help me take a look this PR? 🙏