Corrected an issue with the signup command.
Corrected an issue with the signup command.

The signup command was incorrectly calling authenticate which would cause an
error.

onmodulus/modulus-cli,onmodulus/modulus-cli,XervoIO/cli,XervoIO/cli,XervoIO/cli,nlindley/modulus-cli,nlindley/modulus-cli,onmodulus/modulus-cli