finish for init core

fuware/services/user/user_service.py

@@ -0,0 +1,19 @@
+
+from sqlalchemy.orm import Session
+from fuware.repos import RepositoryUsers
+from fuware.services._base_service import BaseService
+from fuware.schemas import UserCreate
+
+
+class UserService(BaseService):
+  def __init__(self):
+    self.repos = RepositoryUsers()
+
+  def get_all(self, skip: int = 0, limit: int = 100):
+    return self.repos.get_all(skip=skip, limit=limit)
+
+  def get_by_username(self, username: str):
+    return self.repos.get_by_username(username)
+
+  def create(self, db: Session, user: UserCreate):
+    return self.repos.create(db=db, user=user)