I am beginer and I need help in email tool hash variable. My sample flow has two participants - applicant and approver. In mail tool configuration for To (participant id) I gave applicant and in message I gave 'Hi #applicant.firstName#'. Mail goes to the mail id of the applicant as expected but in the message it does not resolve the hash variable i.e. it shows as is 'Hi #applicant.firstName#'. Please help me to resolve this.