Add client_id and client_secret configurations
Add client_id and client_secret configurations

* Provide the OAuth2 client_id and client_secret values in configuration
  variables.

DannyArends/genenetwork2,DannyArends/genenetwork2,zsloan/genenetwork2,DannyArends/genenetwork2,zsloan/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,genenetwork/genenetwork2,genenetwork/genenetwork2,DannyArends/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,DannyArends/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,pjotrp/genenetwork2,DannyArends/genenetwork2