Defaults to current package name (tidywikidatar) and version.
Examples
# Default user agent
default_user_agent <- tw_get_user_agent()
default_user_agent
#> [1] "tidywikidatar/0.6.0"
# Custom user agent
tw_set_user_agent(user_agent = "custom_project_name/email")
new_user_agent <- tw_get_user_agent()
new_user_agent
#> [1] "custom_project_name/email"
# Restore
tw_set_user_agent(user_agent = default_user_agent)
tw_get_user_agent()