UPDATE
March 30, 2020 Update: We understand these are challenging times for our developer community, so we are postponing disabling the Instagram Legacy API Platform by 90 days to June 29, 2020. Remaining endpoints on the Legacy API will no longer be available after this date and your app's users may lose functionality.
We urge you to migrate to the Instagram Graph API and the Instagram Basic Display API without delay so that users of your app have time to transition as well. Both APIs rely on permissions that require App Review , which can take a week or longer to complete, so you should begin the process as soon as you can to avoid any interruption in service. Please see this blog post for tips on getting through our App Review process.
If you're only using the Legacy API to generate tokens in order to display your Instagram Feed on a personal website, you can use the Instagram Basic Display API's User Token Generator to continue generating tokens. The User Token Generator does not require App Review, but it will only work for your owned Instagram accounts (i.e. accounts for which you know the login credentials). Refer to the developer documentation to learn more.