If somebody needs my 2C2P payment extension for Magento 2, then provide me a test (demo, sandbox) account.
2C2P twice (in May of 2016 and in February of 2017 denied to provide me a test account).
There are publicly available test credentials here: https://developer.2c2p.com/docs/sandbox
But these credentials provide only limited abilities (e.g., do not provide 2C2P merchant backend access).
I want to implement the full-featured integration, so I need a «Personalized Test Account».