write query profile

UI/datacheck.py

@@ -33,3 +33,9 @@ class AddUserForm(FlaskForm):
         InputRequired(message='Privilege is required.'),
         Regexp(r'^[0-9]$|^10$', message='Privilege must be an integer between 0 and 10.')
     ])
+
+class QueryProfileForm(FlaskForm):
+    username = StringField('Username', validators=[
+        InputRequired(message='Username is required.'),
+        Regexp(r'^[a-zA-Z][a-zA-Z0-9_]{0,19}$', message='Username must start with a letter and can only contain letters, numbers, and underscores (max 20 characters).')
+    ])