Added login functionality and login required

application/auth/forms.py

@@ -0,0 +1,9 @@
+from flask_wtf import FlaskForm
+from wtforms import StringField, SubmitField, PasswordField
+from wtforms.validators import DataRequired
+
+
+class login_form(FlaskForm):
+    username = StringField("Username", validators=[DataRequired()])
+    password = PasswordField("Password", validators=[DataRequired()])
+    submit = SubmitField(label="Sign in")