Before you can sign a user in, you need to create an Okta Application that represents your mobile application.
First, sign in to the Okta Developer Console:
Select Applications, then Add Application. Pick Native as the platform. Enter a name for your application (or leave the default value).
Enter your callback route for the Login redirect URI. This is the full redirect URI that you defined in the previous step (like
Finally, click Done to finish creating the Okta Application. You need to copy some values into your application later, so leave the Developer Console open.