[Quick Fix] Update gitignore and add temp fix for devs logging in

.gitignore

@@ -7,6 +7,7 @@ local.properties
 
 # Log/OS Files
 *.log
+.DS_Store
 
 # Android Studio generated files and folders
 captures/
@@ -28,11 +29,11 @@ render.experimental.xml
 *.keystore
 
 # Google Services (e.g. APIs or Firebase)
-app/google-services.json
+google-services.json
 
 # Android Profiling
 *.hprof
 
 # Secrets
 secrets.properties
-app/src/main/assets/resell-service.json
+resell-service.json

app/src/main/java/com/cornellappdev/resell/android/viewmodel/onboarding/LandingViewModel.kt

@@ -28,6 +28,7 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import retrofit2.HttpException
 import javax.inject.Inject
 
 @HiltViewModel
@@ -171,6 +172,12 @@ class LandingViewModel @Inject constructor(
                     rootNavigationRepository.navigate(ResellRootRoute.MAIN)
                 }
             } catch (e: Exception) {
+                if (e is HttpException && e.code() == 403) {
+                    Log.d("LandingViewModel", "User not found on backend; routing to onboarding.")
+                    rootNavigationRepository.navigate(ResellRootRoute.ONBOARDING)
+                    return@launch
+                }
+
                 Log.e("LandingViewModel", "Error getting user: ", e)
                 onSignInFailed(showSheet = false)
                 rootConfirmationRepository.showError(