* [backend-comparison] Serialize both auth tokens to cache file
We need to refresh token to be able to renew an expired access token.
* [backend-comparison] Refresh access token
* [backend-comparison] Display user name with auth command
* [backend-comparison] Update README
* [backend-comparison] Fix PR comments
* [backend-comparison] Fix hyphen consistency in benchmark names
* [backend-comparison] Fix release build error when refreshing token
The reqwest must have an explicit empty body otherwise the release
build returns a 411 when refreshing the tokens without even calling
the benchmark server endpoint.
* [backend-comparison] Add auth command to burnbench CLI
* [backend-comparison] Add --share argument to Burnbench CLI
* Cargo clippy fixes
* Fix typos
* Add comment to explain the FIVE_SECONDS constant
* Use num_args to force at least one arg value and make args required
In the run command, makes the --benches and --backends required
The manual check is no longer necessary
* Use and_then instead of match
* Simplify token verification
* Use map_or instead of match
Sylvain Benner