Creating a user consent application using the .NET SDK

Testing your application

When you send an SMS to your Sinch number, the Sinch server sends a request to a callback event URL you need to configure on your SMS service. We'll walk through the processes below:

• Starting your web server and setting up a tunnel
• Configuring your Callback URL
• Testing the application itself

Start your web server and set up a tunnel

1. Open a terminal or command prompt and nagivate to your project directory.
2. Start the server by executing the following command:
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   dotnet run

   Take note of the port on which the server is running.

3. Open another terminal or command prompt and enter:
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   ngrok http https://localhost:<PORT>

   You will see a screen like the following.

4. On the https "Forwarding" line (outlined in the above image), copy the address ending in .ngrok.io and add /Inbound/Subscribe to the end of it.

Configure your Callback URL

1. Navigate to your Sinch Customer Dashboard.
2. Click the Service APIs tab and then click on the service plan ID link.
3. In Callback URLs, click Add Callback URL (or Edit, if you are updating an existing URL) and paste in the HTTPS address referred to in the previous section.

Test the application

Now that your server is running and your webhook is configured, you can test the application. Remember you'll need your phone ready for this!

To test your application, perform the following:

1. Try joining the group you created by texting SUBSCRIBE to your Sinch account number. You should get a confirmation reply.
2. Try leaving the group by texting STOP. This should also generate a reply.
3. Now that you've left the group, text a random phrase such as "Hello world". This should generate the reply thanking you for your interest and telling you to join by texting SUBSCRIBE.