Issue: [link](https://github.com/go-gitea/gitea/issues/9637)
Changes introduced: I have clarified the problematic terms (`login`,
`login_name`, and `username`) in all affected endpoints.
The changes were made to relevant:
- HTTP endpoint parameters' descriptions
- response/request models' fields
Change all license headers to comply with REUSE specification.
Fix#16132
Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
