Fail gracefully when token has no permissions

Currently when the gitlab token doesn't have the required permissions the program panics. Fail gracefully and inform no Admin related queries will be performed.

thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', src/queries.rs:43:77
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Afbrudt (SIGABRT) (smed kerne)