There are more and more commands now. I suggest categorizing them according to the platforms they work on, for example:
python3 -m joint_teapot gitea get-public-keys and python3 -m joint_teapot canvas upload-assignment-grades. Feel free to let me work on this issue or do it yourself, whichever feels better for you.

Like go-gitea/gitea#22101, when using invite-to-teams, the user must be in a team. Otherwise, it will fail to find the team.

Maybe it is better to add it to the error message to help the user.

There are some students whose gitea username is not the integration_id on the canvas system. So we can not do any operation on the account of these students.
I searched api of gitea. It seems that we can not get the username by email.
Is it possible to store a dict that we can store the relationship from integration_id to username by hand and use them later?

it will change original line break again in the latest version