when returning unauthorized error response, handlers log an explanation

restapi/handlers/account-template-add.go

restapi/handlers/account-template-delete.go

restapi/handlers/account-template-get.go

restapi/handlers/account-template-list.go

restapi/handlers/account-template-update.go

restapi/handlers/auth-authenticate.go

restapi/handlers/user-add.go

restapi/handlers/user-apikey-add.go

restapi/handlers/user-apikey-delete.go

restapi/handlers/user-apikey-list.go

restapi/handlers/user-delete.go

restapi/handlers/user-get.go

restapi/handlers/user-get_test.go

restapi/handlers/user-list.go

restapi/handlers/user-list_test.go

restapi/handlers/user-password-delete.go

restapi/handlers/user-password-set.go

restapi/handlers/user-update.go

restapi/handlers/user-update_test.go