fix email validation problem by pip install pydantic[email]

requiremnets.txt

@@ -3,6 +3,8 @@ asgiref==3.4.1
 certifi==2021.10.8
 charset-normalizer==2.0.7
 click==8.0.3
+dnspython==2.1.0
+email-validator==1.1.3
 fastapi==0.70.0
 greenlet==1.1.2
 gunicorn==20.1.0