minor edit to sign out Conflicts: 	docs/auth.md
minor edit to sign out
Conflicts:
	docs/auth.md

mimisasouvanh/onedrive-sdk-ios,jkorell/onedrive-sdk-ios,mimisasouvanh/onedrive-sdk-ios,getto23/onedrive-sdk-ios,getto23/onedrive-sdk-ios,jkorell/onedrive-sdk-ios