Cant add plugin in poetry - python-3.8

Question

I have initialized poetry in my project. Add some libs and got this pyproject.toml:
[tool.poetry]
name = "dataapi"
version = "0.1.0"
description = "API for service."
authors = ["Claus Stolz"]
[tool.poetry.dependencies]
python = "^3.8"
gino = "^1.0.1"
fastapi = "^0.63.0"
uvicorn = "^0.13.3"
gunicorn = "^20.0.4"
alembic = "^1.5.2"
psycopg2 = "^2.8.6"
gino-starlette = "^0.1.1"
[tool.poetry.dev-dependencies]
pytest = "^6.2.1"
requests = "^2.25.1"
[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"
Now i try to add in pyproject.toml my own plugin to use it like entry points in code:
[tool.poetry.plugins."dataapi.modules"]
users = "dataapi.app.api.v1.endpoints.users"
Then try to use poetry install, but it give me message:
Installing dependencies from lock file
No dependencies to install or update
I try another methods of poetry: update,lock, but nothing happened. I tried to delete the lock file and then run poetry install - but it gave no results either.
I run my service to check and it give me an error:
for ep in entry_points()["dataapi.modules"]:
KeyError: 'dataapi.modules'
Method where i try to got entry points:
import logging
from importlib.metadata import entry_points
logger = logging.getLogger(__name__)
def load_modules(app=None):
for ep in entry_points()["dataapi.modules"]:
logger.info("Loading module: %s", ep.name)
mod = ep.load()
if app:
init_app = getattr(mod, "init_app", None)
if init_app:
init_app(app)
I really don't understood how add plugin in poetry and need help...