Set your Metabolights API Token as global option. If MTBLS_API_KEY is set in .Renviron then this variable will be passed directly
to the MTBLS_API_KEY option. If no MTBLS_API_KEY is set in .Renviron, then the API Token must be passed as an input in the set_api_token
function
Usage
mtbls_key(API_KEY = NULL)
Arguments
API_KEY
a character string of your Metabolights API Token (Default is NULL)