Hello maicol07, please a question about the different licences:
flarum-ext-sso has license: MIT
flarum_sso_php_plugin has license: AGPL 3.0
In the flarum-ext-sso you refer to the sub-folder for sample website, so we could use the code, but the sub-folder code has different license (AGPL).
For us which would like to integrate flarum and your plugin with commercial product, this might be a issue for licensing.
As found at: https://softwareengineering.stackexchange.com/questions/107883/agpl-what-you-can-do-and-what-you-cant.
"AGPL is the same as GPL; therefore if your app is using AGPL code it has to be AGPL licensed."
Technically if we use the code in your sub-folder we would have to release our product under AGPL license.
Would it be possible to release both under MIT license?