Add authenticated OAuth applications management

[erickskrauch]

Allow users to get list of authenticated applications and revoke access for some of them.

[erickskrauch]

It seems to be already implemented in the https://github.com/elyby/accounts/commit/b904d5d314c13c8f627f457bc5140f290416a3ec. The new endpoints are:

• GET /api/v1/accounts/{userId}/oauth2/authorized
• DELETE /api/v1/accounts/{userId}/oauth2/authorized/{clientId}