catch all errors

src/routes.js

@@ -640,6 +640,7 @@ module.exports = async (
   });
 
   app.post("/api/lnd/wallet/existing", async (req, res) => {
+    try {
       const { password, alias } = req.body;
       const healthResponse = await checkHealth();
       const exists = await walletExists();
@@ -700,6 +701,11 @@ module.exports = async (
           publicKey
         }
       })
+    } catch (err) {
+      return res.status(500).json({
+        errorMessage: err.message,
+      })
+    }
   });
 
   // get lnd info