email=forms.EmailField(label='Email',max_length=254)

password = forms.CharField(label='Password',
                      widget=forms.PasswordInput())

def clean(self,*args,**kwargs):
    email=self.self.cleaned_data.get("email")
    password=self.cleaned_data.get("password")
    if email and password:
        user=authenticate(email=email,password=password)
        if not user:
            raise forms.ValidationError("This email id is not registered")
        if not user.check_password(password):
            raise forms.ValidationError("Incorrect password")
        return super(UserLoginForm,self).clean(*args,**kwargs)

error_messages = {
    'duplicate_emailid': "This email id is already exists.",
    'duplicate_mobile':  "This mobile no is already exists.",
    'password_mismatch': "The two password fields didn't match.",
    'too_short': "Passwords must be at least 6 characters long.",
}

username= forms.CharField(label='Username', max_length=30)
email = forms.EmailField(label='Email address',max_length=254)
mobile =forms.CharField(label='Mobile No',max_length=10)
password = forms.CharField(label='Password',
                      widget=forms.PasswordInput())
confirm_password = forms.CharField(label='Confirm Password',
                    widget=forms.PasswordInput())
class Meta:
    model = User
    fields = ['username', 'email', 'mobile', 'password','confirm_password']
def username(self):
    username=self.cleaned_data.get("username")
    if username is None:
        msg="Plese Enter the User name"
        raise forms.ValidationError(msg)
    return username

def clean_password(self):
    password = self.cleaned_data.get("password")
    if len(password) < 6:
        raise forms.ValidationError(
            self.error_messages['too_short'],
        )
    return password
def clean_confirm_password(self):
    password1 = self.cleaned_data.get('password')
    confirm_password = self.cleaned_data.get('confirm_password')
    if password and confirm_password and password != confirm_password:
        raise forms.ValidationError(
            self.error_messages['password_mismatch']
        )
    return confirm_password
def clean_email(self):
    email = self.cleaned_data.get('email')
    check_duplicate_email = User.objects.filter (email=email).exists()
    if check_duplicate_email:
        raise forms.ValidationError(
        self.error_messages['duplicate_emailid']
        )
    return email
def clean_mobile(self):
    mobile=self.cleaned_data.get('mobile')
    check_duplicate_mobile=User.objects.filter(mobile=mobile).exists()
    if check_duplicate_mobile:
        raise forms.ValidationError(
        self.error_messages['duplicate_mobile']
        )
    return mobile

title="Login"

form=UserLoginForm(request.POST or None)

if form.is_valid():
    email=form.cleaned_data.get("email")
    password = form.cleaned_data.get("password")
    user=authenticate(email=email,password=password)
    login(request,user)
return render(request,"registration/signup.html",{"form":form,"title"=title})

title="Signup"

form = RegistrationForm(request.POST or None)

if form.is_valid():
    user=form.save(commit=False)
    email = form.cleaned_data.get("email")
    password = form.cleaned_data.get("password")
    user=set_password(password)
    user.save()
    new_user = authenticate(email=user.email, password=password)
    login(request, new_user)
    return redirect("registration/register.html")
return render(request, "registration/signup.html", {"form": form,"title"=title})