Flask: ImmutableMultiDict has no attribute

I wrote a small flask file:

myapp.py

@APP.route('/login', methods=['GET','POST'])
def login():
    return flask.render_template('login.html')

@APP.route('/loginNext', methods=['POST','GET'])
def loginNext():
    user=request.form.username
    passw=request.form.password
    return str(user)+str(pass)

      

        
        
        
      

    

login.html

<form id="foo" method="post" action="/loginNext">
Username : <input type="text" name='username' value="admin">
Password : <input type="password" name='password' value="">
<input type="submit" name="submit" value="Submit">
</form>

      

        
        
        
      

    

When I try to execute request.form.username I get

* AttributeError: "ImmutableMultiDict" object has no "username" attribute *

I read about stackoverflow and other places but didn't work. I tried to do request.form.get ('username', None ') which didn't get the username.