fix: can't save accesstoken (Close #79)

Author: Kerwin

service/src/index.ts

@@ -611,7 +611,7 @@ router.post('/setting-base', rootAuth, async (req, res) => {
 
     if (apiModel === 'ChatGPTAPI' && !isNotEmptyString(apiKey))
       throw new Error('Missing OPENAI_API_KEY environment variable.')
-    else if (!isNotEmptyString(accessToken))
+    else if (apiModel === 'ChatGPTUnofficialProxyAPI' && !isNotEmptyString(accessToken))
       throw new Error('Missing OPENAI_ACCESS_TOKEN environment variable.')
 
     const thisConfig = await getOriginConfig()