Add detailed debug logging for OAuth user creation

Author: zachlatta

app/controllers/sessions_controller.rb

@@ -11,11 +11,18 @@ def callback
     # Find or create user from OAuth data
     user = User.from_omniauth(auth)
 
+    # Debug logging
+    Rails.logger.info "=== OAuth Callback Debug ==="
+    Rails.logger.info "Auth UID: #{auth.uid}"
+    Rails.logger.info "Auth username: #{auth.info.nickname}"
+    Rails.logger.info "User object: #{user.inspect}"
+    Rails.logger.info "User ID: #{user&.id}"
+    Rails.logger.info "User persisted?: #{user&.persisted?}"
+    Rails.logger.info "User errors: #{user&.errors&.full_messages}"
+    
     # Store user ID in session
     session[:user_id] = user.id
 
-    # Debug logging
-    Rails.logger.info "=== OAuth Callback Debug ==="
     Rails.logger.info "Session ID: #{session.id}"
     Rails.logger.info "User ID set: #{session[:user_id]}"
     Rails.logger.info "Request protocol: #{request.protocol}"