support elevenlabs different endpoint (#502)

* support elevenlabs different endpoint

* wip

* wip

* wip

lib/routes/api/speech-credentials.js

@@ -162,6 +162,7 @@ const encryptCredential = (obj) => {
     voice_engine,
     engine_version,
     service_version,
+    api_uri,
     options
   } = obj;
 
@@ -265,7 +266,11 @@ const encryptCredential = (obj) => {
     case 'elevenlabs':
       assert(api_key, 'invalid elevenLabs speech credential: api_key is required');
       assert(model_id, 'invalid elevenLabs speech credential: model_id is required');
-      const elevenlabsData = JSON.stringify({api_key, model_id, options});
+      const elevenlabsData = JSON.stringify({
+        api_key,
+        model_id,
+        ...(api_uri && {api_uri}),
+        options});
       return encrypt(elevenlabsData);
 
     case 'speechmatics':
@@ -537,7 +542,8 @@ router.put('/:sid', async(req, res) => {
           service_version,
           speechmatics_stt_uri,
           resemble_tts_use_tls,
-          resemble_tts_uri
+          resemble_tts_uri,
+          api_uri
         } = req.body;
 
         const newCred = {
@@ -572,7 +578,8 @@ router.put('/:sid', async(req, res) => {
           service_version,
           speechmatics_stt_uri,
           resemble_tts_uri,
-          resemble_tts_use_tls
+          resemble_tts_use_tls,
+          api_uri
         };
         logger.info({o, newCred}, 'updating speech credential with this new credential');
         obj.credential = encryptCredential(newCred);
@@ -865,10 +872,10 @@ router.get('/:sid/test', async(req, res) => {
         }
       }
     } else if (cred.vendor === 'elevenlabs') {
-      const {api_key, model_id} = credential;
+      const {api_key, model_id, api_uri} = credential;
       if (cred.use_for_tts) {
         try {
-          await testElevenlabs(logger, {api_key, model_id});
+          await testElevenlabs(logger, {api_key, model_id, api_uri});
           results.tts.status = 'ok';
           SpeechCredential.ttsTestResult(sid, true);
         } catch (err) {