fix: clear session storage before login

1 job for v0.8.5 in 49 seconds (queued for 19 seconds)
latest
Status Job ID Name Coverage
  Test
failed #8516
sib
test

00:00:49

 
Name Stage Failure
failed
test Test
npm ERR! @startinblox/oidc@0.0.0 test: `npm run lint`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @startinblox/oidc@0.0.0 test script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2019-10-17T21_36_45_452Z-debug.log
ERROR: Job failed: exit code 1