Allow user login with email.

core/api/auth.py

@@ -2,6 +2,7 @@ from django.shortcuts import render
 from rest_framework import generics
 from rest_framework.response import Response
 from knox.models import AuthToken
+from django.contrib.auth.backends import AllowAllUsersModelBackend
 
 from core.serializers.login import LoginSerializer
 from core.serializers.register import RegisterSerializer

core/serializers/login.py

 from django.contrib.auth import authenticate
+from django.contrib.auth.models import User
 from rest_framework import serializers
 
 
@@ -7,6 +8,11 @@ class LoginSerializer(serializers.Serializer):
     password = serializers.CharField()
 
     def validate(self, data):
+        usersByEmail = User.objects.filter(email=data['username'].lower())
+        if len(usersByEmail) != 0:
+            username = usersByEmail[0].username
+            data['username'] = username
+
         user = authenticate(**data)
         if not user:
             raise serializers.ValidationError('Invalid Credentials.')

core/serializers/register.py

 from django.contrib.auth.models import User
 from rest_framework import serializers
 
-from core.models.profile import Profile
-
 
 class RegisterSerializer(serializers.ModelSerializer):
     class Meta:
@@ -17,3 +15,8 @@ class RegisterSerializer(serializers.ModelSerializer):
             validated_data['password']
         )
         return user
+
+    def validate(self, data):
+        if len(User.objects.filter(email=data['email'])) != 0:
+            raise serializers.ValidationError({"email": "A user with that email already exists."})
+        return data