This function will interactively add the information of an author from the local authors database.
add_author(path = ".")the path to the index.Rmd of the bookdown report.
Other utils: 
add_report_numbers(),
check_dependencies(),
column_start(),
column_width(),
cover_info(),
create_report(),
dyn_table(),
references(),
render_natbib(),
validate_doi()