Django user authentication does not work, how can I fix my login?

Question

I am using the django-email-verification app and I had to change how a User is signed up but I left the login authentication part the same. Every time I try to login it does not allow me to sign in and says that the credentials are wrong. Also I used emails as usernames. I'm thinking its the:
user = auth.authenticate(username=request.POST['username'], password=request.POST['password'])
that needs to be changed. Please how do I fix the login?

from django.shortcuts import render, redirect
from django.contrib.auth.models import User
from django.contrib import auth
from django.contrib.auth import get_user_model
from django_email_verification import sendConfirm


def signup(request):
    if request.method == 'POST':
        if request.POST['pass1'] == request.POST['pass2']:
            try:
                user = User.objects.get(username=request.POST['username'])
                return render(request, 'accounts/signup.html', {'error': 'Email is already registered'})
            except User.DoesNotExist:
                '''user = User.objects.create_user(request.POST['username'], password=request.POST['pass1'])
                auth.login(request, user)'''
                user = get_user_model().objects.create(username=request.POST['username'], password=request.POST['pass1'], email=request.POST['username'])
                sendConfirm(user)
                return redirect('home')
        else:
            return render(request, 'accounts/signup.html', {'error': 'Passwords must match'})
    else:
        return render(request, 'accounts/signup.html')

def login(request):
    if request.method == 'POST':
        user = auth.authenticate(username=request.POST['username'], password=request.POST['password'])
        if user is not None:
            auth.login(request, user)
            return redirect('home')
        else:
            return render(request, 'accounts/login.html',{'error':'username or password is incorrect.'})
    else:
        return render(request, 'accounts/login.html')

def logout(request):
    if request.method == 'POST':
        auth.logout(request)
        return redirect('home')

Answer 1

The problem is not with authenticating, but with creating the user. Passwords are normally hashed . The .create(…) function [Django-doc] will not hash these, you can make use of .create_user(…) [Django-doc] instead:

user = get_user_model().objects.
    username=request.POST['username'],
    password=request.POST['pass1'],
    email=request.POST['username']

The .create_user(…) function is a function the manager of the user model normally should provide. This will for (most) user models store the hash of the password in the database.