Retrieves the timeout value for POWER API requests from the
nasapower.timeout option, falling back to a default of 10L seconds
if not set.
Examples
# Use default
.get_timeout()
#> Error in .get_timeout(): could not find function ".get_timeout"
# Override via option
options(nasapower.timeout = 60L)
.get_timeout()
#> Error in .get_timeout(): could not find function ".get_timeout"
