add get_auth_token and generate_auth_token methods to Carto::User
add get_auth_token and generate_auth_token methods to Carto::User

CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,CartoDB/cartodb,splashblot/dronedb,splashblot/dronedb,CartoDB/cartodb