Creating production and development certificates

We need to create production and development certificates. Production certificates are used for the App Store. Development certificates are used to verify that you are a team member allowing apps signed by you to launch on a device. Remember that Xcode 8 can now handle this for you, but knowing the process is still useful. Let's start by creating a production certificate first:

1. Log in to the Apple developer account, and you will see the following screen:
   
2. Click on Certificates, Identifiers & Profiles and, then, under Certificates, select All.
3. Click on the + at the top right of the screen:
   
4. In the screen that appears, select App Store and Ad Hoc under Production and, then, click on Continue:
   
5. Then, the following screen lists the steps on how to create a CSR file (which we already created). Click on Continue:
   
6. Upload the CSR created earlier by selecting Choose File under Upload CSR file and, then, selecting the certificate file you saved and...