Populate user name field in social auth (#3968)

* Populate user name field in social auth

* Add docstring for populate_user

* Fix missing def

* Fix missing def

* Add some type hints to the SocialAccountAdapter class

---------

Co-authored-by: Bruno Alla <browniebroke@users.noreply.github.com>
Co-authored-by: Bruno Alla <alla.brunoo@gmail.com>

{{cookiecutter.project_slug}}/{{cookiecutter.project_slug}}/users/adapters.py

@@ -1,16 +1,37 @@
-from typing import Any
+from __future__ import annotations
+
+import typing
 
 from allauth.account.adapter import DefaultAccountAdapter
 from allauth.socialaccount.adapter import DefaultSocialAccountAdapter
 from django.conf import settings
 from django.http import HttpRequest
 
+if typing.TYPE_CHECKING:
+    from allauth.socialaccount.models import SocialLogin
+    from {{cookiecutter.project_slug}}.users.models import User
+
 
 class AccountAdapter(DefaultAccountAdapter):
-    def is_open_for_signup(self, request: HttpRequest):
+    def is_open_for_signup(self, request: HttpRequest) -> bool:
         return getattr(settings, "ACCOUNT_ALLOW_REGISTRATION", True)
 
 
 class SocialAccountAdapter(DefaultSocialAccountAdapter):
-    def is_open_for_signup(self, request: HttpRequest, sociallogin: Any):
+    def is_open_for_signup(self, request: HttpRequest, sociallogin: SocialLogin) -> bool:
         return getattr(settings, "ACCOUNT_ALLOW_REGISTRATION", True)
+
+    def populate_user(self, request: HttpRequest, sociallogin: SocialLogin, data: dict[str, typing.Any]) -> User:
+        """
+        Populates user information from social provider info.
+
+        See: https://django-allauth.readthedocs.io/en/latest/advanced.html?#creating-and-populating-user-instances
+        """
+        user = sociallogin.user
+        if name := data.get("name"):
+            user.name = name
+        elif first_name := data.get("first_name"):
+            user.name = first_name
+            if last_name := data.get("last_name"):
+                user.name += f" {last_name}"
+        return super().populate_user(request, sociallogin, data)