Merge pull request #3221 from ResearchHub/bug/social-login-failed-for-existing-users

[Bug]: Fix Google social login for existing email users

Author: nicktytarenko

src/researchhub/settings.py

@@ -427,6 +427,14 @@ def silky_capture(request):
 SOCIALACCOUNT_EMAIL_VERIFICATION = "none"
 SOCIALACCOUNT_EMAIL_REQUIRED = False
 SOCIALACCOUNT_QUERY_EMAIL = True
+# Let Google sign-ins attach to an existing account when the email matches.
+# See: https://docs.allauth.org/en/dev/socialaccount/configuration.html
+SOCIALACCOUNT_EMAIL_AUTHENTICATION_AUTO_CONNECT = True
+SOCIALACCOUNT_PROVIDERS = {
+    "google": {
+        "EMAIL_AUTHENTICATION": True,
+    },
+}
 
 
 GOOGLE_REDIRECT_URL = "http://localhost:8000/auth/google/login/callback/"