Step 1 - Initiate Password Reset

API endpoint to initiate an "I forgot my password" transaction for a client.
This is Step 1 in the reset password process. A 204 will be returned on
success, and a 400 will be returned on a failure.

• If the client has set up their Security Questions, they will be sent a
  link that they may use to continue the password reset process. This will
  prevent any current reset process from continuing.

• If the client does not have Security Questions or contact details set
  up, they will be unable to use this process, and must contact the
  institution to reset their password.