fix password is not bytes in mysql

nativeauthenticator/orm.py

@@ -2,15 +2,15 @@
 import re
 from jupyterhub.orm import Base
 
-from sqlalchemy import Boolean, Column, Integer, String
+from sqlalchemy import Boolean, Column, Integer, String, LargeBinary
 from sqlalchemy.orm import validates
 
 
 class UserInfo(Base):
     __tablename__ = 'users_info'
     id = Column(Integer, primary_key=True, autoincrement=True)
     username = Column(String, nullable=False)
-    password = Column(String, nullable=False)
+    password = Column(LargeBinary, nullable=False)
     is_authorized = Column(Boolean, default=False)
     email = Column(String)
 

nativeauthenticator/tests/test_orm.py

@@ -1,5 +1,6 @@
 import pytest
 from jupyterhub.tests.mocking import MockHub
+from sqlalchemy.exc import StatementError
 
 from ..orm import UserInfo
 
@@ -19,10 +20,17 @@ def app():
 @pytest.mark.parametrize('email', ['john', 'john@john'])
 def test_validate_method_wrong_email(email, tmpdir, app):
     with pytest.raises(AssertionError):
-        UserInfo(username='john', password='pwd', email=email)
+        UserInfo(username='john', password=b'pwd', email=email)
 
 
 def test_validate_method_correct_email(tmpdir, app):
-    user = UserInfo(username='john', password='pwd', email='[email protected]')
+    user = UserInfo(username='john', password=b'pwd', email='[email protected]')
     app.db.add(user)
     assert UserInfo.find(app.db, 'john')
+
+
+def test_wrong_pwd_type(tmpdir, app):
+    with pytest.raises(StatementError):
+        user = UserInfo(username='john', password='pwd', email='[email protected]')
+        app.db.add(user)
+        UserInfo.find(app.db, 'john')