Remove default values.

config.py

@@ -13,16 +13,15 @@ class Config:
             'trigger': 'interval'
         }
     ]
-    MAIL_SERVER = os.environ.get('MAIL_SERVER', 'smtp.gmail.com')
-    MAIL_PORT = int(os.environ.get('MAIL_PORT', '587'))
-    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS', 'true').lower() in \
-        ['true', 'on', '1']
+    MAIL_SERVER = os.environ.get('MAIL_SERVER')
+    MAIL_PORT = int(os.environ.get('MAIL_PORT'))
+    MAIL_USE_TLS = os.environ.get('MAIL_USE_TLS').lower() == 'true'
     MAIL_USERNAME = os.environ.get('MAIL_USERNAME')
     MAIL_PASSWORD = os.environ.get('MAIL_PASSWORD')
     OPAQUE_ADMIN = os.environ.get('OPAQUE_ADMIN')
     OPAQUE_STORAGE = os.environ.get('OPAQUE_STORAGE')
     OPAQUE_MAIL_SUBJECT_PREFIX = '[Opaque]'
-    OPAQUE_MAIL_SENDER = 'Opaque Development <dev.opaque@gmail.com>'
+    OPAQUE_MAIL_SENDER = 'Opaque'
     SECRET_KEY = os.environ.get('SECRET_KEY') or 'hard to guess string'
     SQLALCHEMY_TRACK_MODIFICATIONS = False
 

opaque.py

+from dotenv import load_dotenv
+load_dotenv()
+
 from app import create_app, db, socketio
 from app.models import Corpus, User, Role, Permission, Job
-from dotenv import load_dotenv
 from flask_migrate import Migrate
 import os
 
 
-load_dotenv()
 
 
 app = create_app(os.getenv('FLASK_CONFIG') or 'default')