Fixed typeo

Can't believe i've done this

backend/secfit/users/serializers.py

@@ -36,8 +36,8 @@ class UserSerializer(serializers.HyperlinkedModelSerializer):
         password = data.get("password")
         password1 = data.get("password1")
 
-        if password != password1():
-            raise forms.ValidationError("The passwords must match")
+        if password != password1:
+            raise serializers.ValidationError("The passwords must match")
 
         try:
             password_validation.validate_password(password)