Fix telnyx auth api response parsing

This is clearly a terrible bug that would authenticate anyone regardles
of if they input the correct code. I'm not sure if the API changed out
from under me, or more likley I templated this in and didn't follow up
to finish it.

rita_client_registration/src/lib.rs

@@ -301,6 +301,13 @@ pub struct TelnyxSmsAuthCheck {
     code: String,
 }
 
+/// Response code is either accepted or rejected
+#[derive(Debug, Deserialize)]
+pub struct TelnyxSmsAuthResponse {
+    pub phone_number: PhoneNumber,
+    pub response_code: String,
+}
+
 /// Posts to the validation endpoint with the code, will return success if the code
 /// is the same as the one sent to the user
 pub async fn check_sms_auth_result(
@@ -316,6 +323,7 @@ pub async fn check_sms_auth_result(
         number
     );
 
+
     let client = awc::Client::default();
     match client
         .post(check_url)
@@ -326,7 +334,14 @@ pub async fn check_sms_auth_result(
         })
         .await
     {
-        Ok(a) => Ok(a.status().is_success()),
+        Ok(a) => {
+            let response = a.json::<TelnyxSmsAuthResponse>().await?;
+            if response.response_code == "accepted" {
+                Ok(true)
+            } else {
+                Ok(false)
+            }
+        },
         Err(e) => {
             error!("Failed to verify code with {:?}", e);
             Err(e.into())