Accept \n line ending in token file

[fkjensen]

Using humioctl 0.28.2 I see that '\n' is not accepted as a line ending for the token file. For usability reasons it can be a nice idea.

Works

bin/humioctl -u darkstar.evilcorp.com groups list
...

End of line feature for \n

echo "********************************************" > ~/.humio/darkstar.token
bin/humioctl -u darkstar.evilcorp.com groups list
bin/humioctl --token-file ~/.humio/darkstar.token -u darkstar.evilcorp.com groups list
error listing groups: Post "https://darkstar.evilcorp.com/graphql": net/http: invalid header field value "Bearer ********************************************\n" for key Authorization

Fix by removing '\n' at the end of the token file

truncate -s -1 ~/.humio/darkstar.token

Works with truncated token file

bin/humioctl --token-file ~/.humio/darkstar.token -u darkstar.evilcorp.com groups list
...