update connection

requirements.txt

@@ -4,4 +4,5 @@ fastapi==0.68.0
 uvicorn==0.15.0
 python-dotenv==0.19.0
 pydantic~=1.8.2
-SQLAlchemy~=1.4.22
+SQLAlchemy~=1.4.22
+PyMySQL==1.0.2

utils/__init__.py

@@ -0,0 +1,3 @@
+from utils.database import engine
+from utils.database import Base
+from utils.database import SessionLocal

utils/database.py

@@ -0,0 +1,17 @@
+import os
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+SQLALCHEMY_DATABSE_URL = "mariadb+pymysql://{}:{}@{}/{}?charset=utf8mb4".format(os.getenv('MARIADB_USERNAME'),
+                                                                                os.getenv('MARIADB_PASSWORD'),
+                                                                                os.getenv('MARIADB_HOST'),
+                                                                                os.getenv('DB_NAME'))
+
+engine = create_engine(
+    SQLALCHEMY_DATABSE_URL, connect_args={"check_same_thread": False}
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()