You can cancel your account at any time.

On the dashboard, navigate to the Settings page which you can find at the bottom of the left-hand menu. You will be able to see the option to delete your profile. 

This will shut-down access to your profile, cancel all uploading of feeds and remove all information. Please contact your Account Manager to complete this process. 

If you would simply like to turn off access, without losing all of your information, then you are able to select 'Turn my Miappi Off' as an alternative.