📦 chore(api_key/crud.py): add CRUD functions for managing API keys in the database

This commit adds the following functions to the `api_key/crud.py` file:
- `get_api_keys`: Retrieves a list of API keys associated with a specific user ID from the database.
- `create_api_key`: Generates a random API key, hashes it, and creates a new `ApiKey` object in the database.
- `delete_api_key`: Deletes an API key from the database based on its ID.

These functions provide the necessary functionality for managing API keys in the application's database.

src/backend/langflow/services/database/models/api_key/crud.py

@@ -0,0 +1,44 @@
+import secrets
+from uuid import UUID
+from typing import List
+from langflow.services.auth.utils import get_password_hash
+from sqlmodel import Session, select
+from langflow.services.database.models.api_key import (
+    ApiKey,
+    ApiKeyCreate,
+    UnmaskedApiKeyRead,
+    ApiKeyRead,
+)
+
+
+def get_api_keys(session: Session, user_id: str) -> List[UnmaskedApiKeyRead]:
+    query = select(ApiKey).where(ApiKey.user_id == user_id)
+    api_keys = session.exec(query).all()
+    return [ApiKeyRead.from_orm(api_key) for api_key in api_keys]
+
+
+def create_api_key(
+    session: Session, api_key_create: ApiKeyCreate, user_id: str
+) -> UnmaskedApiKeyRead:
+    # Generate a random API key with 32 bytes of randomness
+    generated_api_key = secrets.token_urlsafe(32)
+
+    # hash the API key
+    hashed_api_key = get_password_hash(generated_api_key)
+    # Use the generated key to create the ApiKey object
+    api_key = ApiKey(api_key=hashed_api_key, **api_key_create.dict(), user_id=user_id)
+
+    session.add(api_key)
+    session.commit()
+    session.refresh(api_key)
+    unmasked = UnmaskedApiKeyRead.from_orm(api_key)
+    unmasked.api_key = generated_api_key
+    return unmasked
+
+
+def delete_api_key(session: Session, api_key_id: UUID) -> None:
+    api_key = session.get(ApiKey, api_key_id)
+    if api_key is None:
+        raise ValueError("API Key not found")
+    session.delete(api_key)
+    session.commit()