Python 我的自定义用户身份验证无法工作

我为Django项目创建了一个自定义用户模型，这样用户就可以使用电子邮件登录。但是，身份验证不起作用。
这是我的代码：
观点：

我的后端：

def authenticate(self, username=None, password=None,):
    try:
        user = User.objects.get(email=username)
        if user.check_password(password):
            return True
    except User.DoesNotExist:
        return True

def get_user(self, user_id):
    try:
        user = User.objects.get(pk=user_id)
        if user.is_active:
            return user
        return None
    except User.DoesNotExist:
        return None

我的用户模型：

class UserManager(BaseUserManager):
def _create_user(self, first_name, last_name, username, email, is_admin, password=None, **extra_fields):
    """
    creates a User with first name, last name, username, email,  password
    """

    if not email:
        raise ValueError('The given email must be set')

    email = self.normalize_email(email)
    user = self.model(
        first_name=first_name,
        last_name=last_name,
        username=username,
        email=email,
        is_admin=is_admin,
        is_active=True,
        **extra_fields,
    )
    user.set_password(password)
    user.save(using=self._db)
    return user

def create_user(self, first_name, last_name, username, email, password, **extra_fields):
    return self._create_user(
        first_name,
        last_name,
        username,
        email,
        False,
        password,
        **extra_fields
    )

def create_superuser(self, first_name, last_name, username, email, password=None, **extra_fields):
    return self._create_user(
        first_name,
        last_name,
        username,
        email,
        True,
        password,
        **extra_fields
    )


class User(AbstractBaseUser):
first_name = models.CharField(
    max_length=256,
    unique=False,
    verbose_name='first name',
)
last_name = models.CharField(
    verbose_name='last name',
    max_length=256,
    unique=False,
)
username = models.CharField(
    verbose_name='username',
    max_length=256,
    unique=False,
)
email = models.EmailField(
    verbose_name='email',
    max_length=256,
    unique=True,
)
is_active = models.BooleanField(
    default=True,
)
 is_admin = models.BooleanField(
     default=False,
 )

objects = UserManager()

USERNAME_FIELD = 'email'
REQUIRED_FIELDS = [
    'first_name',
    'last_name',
    'username',
]

class Meta:
    verbose_name = _('user')
    verbose_name_plural = _('users')

def get_full_name(self):
    full_name = "{} {}".format(self.first_name, self.last_name)
    return full_name.strip()

def get_short_name(self):
    return self.first_name

def __str__(self):  # __unicode__ on Python 2
    return self.email

def email_user(self, subject, message, from_email):
    send_mail(subject, message, from_email, [self.email])

def has_module_perms(self, app_label):
    "Does the user have permissions to view the app `app_label`?"
    # Simplest possible answer: Yes, always
    return True

def has_perm(self, perm, obj=None):
    return self.is_admin

@property
def is_staff(self):
    "Is the user a member of staff?"
    # Simplest possible answer: All admins are staff
    return self.is_admin

我的设置：

 AUTH_USER_MODEL = 'custom_user.User'

 AUTHENTICATION_BACKENDS = ('custom_user.backends.UserAuth', )

我的表格：

     email = forms.CharField(
    widget=forms.TextInput(attrs={'class': 'registerforms', 'placeholder': 'Email'}),
    label='',
)
password = forms.CharField(
    widget=forms.PasswordInput(attrs={'class': 'registerforms', 'placeholder': 'Password'}),
    label='',
)

---

我没有收到错误，但是它不会让用户登录

何时收到错误？错误说明了什么？如果user:print（True）login（request，user）return redirect（“/account/”），它将在lineuser=authenticate（usename=email，password=password）处停止工作。您何时收到错误？错误说明了什么？如果user:print（True）login（request，user）return redirect（“/account/”），它将在lineuser=authenticate（usename=email，password=password）处停止工作

     email = forms.CharField(
    widget=forms.TextInput(attrs={'class': 'registerforms', 'placeholder': 'Email'}),
    label='',
)
password = forms.CharField(
    widget=forms.PasswordInput(attrs={'class': 'registerforms', 'placeholder': 'Password'}),
    label='',
)