The TTL was supplied to the middleware as a duration and then in that middleware multiplied by `time.Second` again. Durations should not be multiplied because they result in unintended values.
```go
time.Second * 1 = 1s
time.Second * time.Second = 277777h46m40s
```
Configureable via:
PROXY_ACCOUNT_BACKEND_TYPE=cs3
PROXY_ACCOUNT_BACKEND_TYPE=accounts (default)
By using a backend which implements the CS3 user-api (currently provided by reva/storage) it is possible to bypass
the ocis-accounts service and for example use ldap directly.
Hides user and auth related communication behind a facade (user/backend) to minimize logic-duplication across middlewares.
Allows to switich the account backend from accounts to cs3.
Co-authored-by: Jörn Friedrich Dreyer <jfd@butonic.de>
