Adds user to Jira Admin
- Username (text): Username/Title of added user.
- Display Name (text): Screen/Display name of added user.
- Password (text): Password for user to use to sign in once they link in email.
- Email (text): Email address of added user.
- Notify? (true/false): If true, user will be notified that they are added.
- User Key (text): Key name of associated with user.