try-catch for anonymous user parsing

app/src/main/java/awais/instagrabber/viewmodels/ProfileFragmentViewModel.kt

@@ -222,7 +222,7 @@ class ProfileFragmentViewModel(
     private suspend fun fetchUser(
         currentUser: User?,
         stateUsername: String,
-    ): User {
+    ): User? {
         if (currentUser != null) {
             // logged in
             val tempUser = userRepository.getUsernameInfo(stateUsername)

app/src/main/java/awais/instagrabber/webservices/GraphQLRepository.kt

@@ -178,12 +178,15 @@ open class GraphQLRepository(private val service: GraphQLService) {
     // TODO convert string response to a response class
     open suspend fun fetchUser(
         username: String,
-    ): User {
+    ): User? {
         val response = service.getUser(username)
-        val body = JSONObject(response
+        try {
+            val body = JSONObject(
+                response
                     .split("<script type=\"text/javascript\">window._sharedData = ").get(1)
                     .split("</script>").get(0)
-            .trim().replace(Regex("\\};$"), "}"))
+                    .trim().replace(Regex("\\};$"), "}")
+            )
             val userJson = body
                 .getJSONObject("entry_data")
                 .getJSONArray("ProfilePage")
@@ -224,6 +227,11 @@ open class GraphQLRepository(private val service: GraphQLService) {
                 externalUrl = url,
             )
         }
+        catch (e: Exception) {
+            Log.e(TAG, "fetchUser failed", e)
+            return null
+        }
+    }
 
     // TODO convert string response to a response class
     suspend fun fetchPost(