diff --git a/src/config.py b/src/config.py
index 74e8b66..03ab027 100644
--- a/src/config.py
+++ b/src/config.py
@@ -77,8 +77,8 @@ SQLALCHEMY_DATABASE_URI = f"postgresql+asyncpg://{_DATABASE_CREDENTIAL_USER}:{_Q
 # collector
 COLLECTOR_HOSTNAME = config("COLLECTOR_HOSTNAME", default="http://192.168.1.86")
 COLLECTOR_PORT = config("COLLECTOR_PORT", cast=int, default=5432)
-_COLLECTOR_CREDENTIAL_USER = config("COLLECTOR_CREDENTIAL_USER", default="postgres")
-_COLLECTOR_CREDENTIAL_PASSWORD = config("COLLECTOR_CREDENTIAL_PASSWORD", default="postgres")
+_COLLECTOR_CREDENTIAL_USER = config("COLLECTOR_CREDENTIAL_USER")
+_COLLECTOR_CREDENTIAL_PASSWORD = config("COLLECTOR_CREDENTIAL_PASSWORD")
 _QUOTED_COLLECTOR_PASSWORD = parse.quote(str(_COLLECTOR_CREDENTIAL_PASSWORD))
 COLLECTOR_NAME = config("COLLECTOR_NAME", default="digital_twin")
 
@@ -95,3 +95,6 @@ RELIABILITY_APP_URL = config(
 )
 
 RBD_APP_URL = config("RBD_APP_URL", default="http://192.168.1.82:8000/rbd")
+
+DEV_USERNAME = config("DEV_USERNAME")
+DEV_PASSWORD = config("DEV_PASSWORD")
diff --git a/src/modules/config.py b/src/modules/config.py
index 7ffa027..3c004e0 100644
--- a/src/modules/config.py
+++ b/src/modules/config.py
@@ -4,7 +4,7 @@ import os
 
 sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '../..')))
 
-from src.config import DATABASE_HOSTNAME, DATABASE_PORT, COLLECTOR_HOSTNAME, COLLECTOR_PORT, _DATABASE_CREDENTIAL_USER, _DATABASE_CREDENTIAL_PASSWORD, _COLLECTOR_CREDENTIAL_USER, _COLLECTOR_CREDENTIAL_PASSWORD, DATABASE_NAME, COLLECTOR_NAME
+from src.config import DATABASE_HOSTNAME, DATABASE_PORT, COLLECTOR_HOSTNAME, COLLECTOR_PORT, _DATABASE_CREDENTIAL_USER, _DATABASE_CREDENTIAL_PASSWORD, _COLLECTOR_CREDENTIAL_USER, _COLLECTOR_CREDENTIAL_PASSWORD, DATABASE_NAME, COLLECTOR_NAME, DEV_USERNAME, DEV_PASSWORD
 
 def get_production_connection():
     try:
diff --git a/src/modules/equipment/Prediksi.py b/src/modules/equipment/Prediksi.py
index 44a621f..8ccf4c9 100644
--- a/src/modules/equipment/Prediksi.py
+++ b/src/modules/equipment/Prediksi.py
@@ -16,7 +16,7 @@ from dotenv import load_dotenv
 import sys
 import os
 from .formula import rc_labor_cost, rc_lost_cost, rc_total_cost
-from src.modules.config import get_connection, get_production_connection
+from src.modules.config import get_connection, get_production_connection, DEV_USERNAME, DEV_PASSWORD
 import json
 
 load_dotenv()
@@ -566,7 +566,7 @@ class Prediksi:
         
 
     # Authentication: sign-in and refresh helpers
-    async def sign_in(self, username: str = "lcca_admin", password: str = "password") -> dict:
+    async def sign_in(self, username: str = DEV_USERNAME, password: str = DEV_PASSWORD) -> dict:
         """Sign in to AUTH_APP_URL/sign-in using provided username/password.
 
         Stores access_token and refresh_token on the instance when successful and returns the parsed response dict.
diff --git a/src/modules/plant/fetch_eaf_from_rbd.py b/src/modules/plant/fetch_eaf_from_rbd.py
index 011c77f..0766a84 100644
--- a/src/modules/plant/fetch_eaf_from_rbd.py
+++ b/src/modules/plant/fetch_eaf_from_rbd.py
@@ -6,14 +6,14 @@ from datetime import datetime
 from sqlalchemy import select
 from src.database.core import DbSession
 from src.yeardata.model import Yeardata
-from src.config import RBD_APP_URL
+from src.config import RBD_APP_URL, DEV_USERNAME, DEV_PASSWORD
 
 logger = logging.getLogger(__name__)
 
 current_year = datetime.now().year
 AUTH_APP_URL = os.getenv("AUTH_APP_URL", "http://192.168.1.82:8000/auth")
 
-async def sign_in(username: str = "lcca_admin", password: str = "password") -> str:
+async def sign_in(username: str = DEV_USERNAME, password: str = DEV_PASSWORD) -> str:
     """
     Sign in to AUTH_APP_URL/sign-in using provided username/password.
     Returns the access_token string if successful, else None.