I am new to galaxy. I"m trying to write a data input tool wrapper.  It will call a script that does a query, produces a list of files, and then the plan is to use the BioBlend API to create datasets/data collections in galaxy.  In other words I am making the dataset(s) based on the contents of this file, rather than making a dataset from that file.  In my case this file has a pair of columns representing FASTQ files, and I want to create one paired dataset collection in galaxy for each genome.

In theory using bioblend to create datasets is easy.  However, when I call this as a galaxy tool, I have not found a clean way to pass the credentials to bioblend.  BioBlend needs to know the serverURL and either the user's API key or username/password.  I think if I poke around $__app__ or $__user__ there's a good change I will find a property with the information I need; however, this has the obvious problem of writing the API key to the log.  

Is there another way to approach this problem?  

Thanks in advance for any help,

Ben