Unable to create a username for Apple Education Community

Re: "Apple education community

I always get a problem when registering to apple education community. I cannot make username"

Seems (from the linked article below) you would use your Apple Account .... most likely the same username and password you used to sign in here, and in use for Apple services like Facetime, Messages, iCloud etc.

You can also check if membership is available in your country or region in the article below:

and

wondering if Apple Support's online article:(link below) can help solve the situation:

See About the Apple Education Community - Apple Support

Eg: says:

You can use your personal Apple Account (recommended) to sign up for the Apple Education Community, or you can use a Managed Apple Account assigned by your school if your role is an instructor, manager, or administrator. Managed Apple Accounts with a student role are restricted from accessing the Apple Education Community.

If you don’t have a personal Apple Account, learn how to create one.

Yet if you still: "Have trouble signing up?

For Apple Education Community feedback or trouble with signing up, 

contact Apple Education Community Support."