from django import forms
from signup.models import allusers1
from django.contrib.auth import (

    authenticate,
    login,
    logout,
    get_user_model,

)

User=get_user_model()
class UserLoginForm(forms.ModelForm):
        class Meta:
            model = allusers1
            fields=['username','password']
            widgets = {
            'password': forms.PasswordInput(),
            }

            def clean(self  ,*args,**kwargs):
                username=self.cleaned_data.get("username")
                password=self.cleaned_data.get("password")

                user_qs = User.objects.filter(username=username)
                if user_qs.count() == 0:
                    raise forms.ValidationError("The user does not exist")
                else:
                    if username and password:
                         user = authenticate(username=username, password=password)

                         if not user:
                            raise forms.ValidationError("Incorrect password")
                         if not user.is_active:

                             raise forms.ValidationError("This user is no longer active")


                return super(UserLoginForm,self).clean(*args,**kwargs)

from django.db import models
from django import forms

# Create your models here.
class allusers1(models.Model):
    username=models.CharField(max_length=40)
    password=models.CharField(max_length=40)
    phoneno=models.CharField(max_length=10,primary_key=True)
    otp=models.IntegerField(blank=True,null=True,default=0000)

    def __str__(self):
         return self.username

from django.shortcuts import render,redirect
from .forms import UserLoginForm
from django.contrib.auth import login as auth_loginwa
from django.contrib.auth import (

    authenticate,
    logout,
    get_user_model,

)

def login(request):
    form1=UserLoginForm(request.POST or None)

    if form1.is_valid():
        username=form1.cleaned_data.get("username")
        password=form1.cleaned_data.get("password")
        user=authenticate(username=username,password=password)
        auth_loginwa(request,user)
        print(request.user.is_authenticated())
        return redirect("home2")
    context= {
        "form1": form1,
    }

    return render(request, "login.html",context)

<form action="" method="POST">
{%   csrf_token %}
    {{ form1.as_p }}
    <input type="submit" value="SUBMIT"/>
</form>