Problems uploading a new add-on (SOLVED)

I have created a new addon.

I want to upload it

I enter in my developer page.

When I click to upload, appears a double verification factor in which I need to download an app register with it to verify my identity… AND THIS PROCESS IS NOT FREE.

What can I do to upload my add-on FREE

There should be no payments necessary for setting up a TFA, unless you don’t own a smartphone yet :).
If you do have a smartphone, then install one of these:
https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2
https://play.google.com/store/apps/details?id=com.azure.authenticator
‎Google Authenticator App - App Store

Where did you get this information?
(The part about the app not being free.)

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