Move access token credentials storage to a method
Move access token credentials storage to a method

codeandtheory/cartodb,bloomberg/cartodb,UCL-ShippingGroup/cartodb-1,codeandtheory/cartodb,splashblot/dronedb,DigitalCoder/cartodb,splashblot/dronedb,nuxcode/cartodb,bloomberg/cartodb,raquel-ucl/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,splashblot/dronedb,UCL-ShippingGroup/cartodb-1,nyimbi/cartodb,CartoDB/cartodb,future-analytics/cartodb,dbirchak/cartodb,bloomberg/cartodb,raquel-ucl/cartodb,codeandtheory/cartodb,future-analytics/cartodb,CartoDB/cartodb,thorncp/cartodb,raquel-ucl/cartodb,dbirchak/cartodb,splashblot/dronedb,UCL-ShippingGroup/cartodb-1,codeandtheory/cartodb,thorncp/cartodb,DigitalCoder/cartodb,CartoDB/cartodb,DigitalCoder/cartodb,codeandtheory/cartodb,raquel-ucl/cartodb,nuxcode/cartodb,nuxcode/cartodb,thorncp/cartodb,future-analytics/cartodb,CartoDB/cartodb,thorncp/cartodb,dbirchak/cartodb,UCL-ShippingGroup/cartodb-1,thorncp/cartodb,CartoDB/cartodb,UCL-ShippingGroup/cartodb-1,nyimbi/cartodb,nyimbi/cartodb,bloomberg/cartodb,bloomberg/cartodb,future-analytics/cartodb,DigitalCoder/cartodb,nuxcode/cartodb,dbirchak/cartodb,splashblot/dronedb,dbirchak/cartodb,nyimbi/cartodb,raquel-ucl/cartodb,nyimbi/cartodb,nuxcode/cartodb