Calling a certificate to use as authentication for download
<p>I'm trying to create a download tool that downloads multiple data files at numerous links from a single database that requires a username/password. </p>

<p>To be specific, these are netcdf files and when I am logged into the database, I can simply enter this URL, hit enter, and automatically download this data:
<em><a href="https://vesg.ipsl.upmc.fr/thredds/dodsC/GeoMIP/output/IPSL/IPSL-CM5A-LR/rcp45/3hr/atmos/3hr/r1i1p1/v20130428/vas/vas_3hr_IPSL-CM5A-LR_rcp45_r1i1p1_200601010300-205601010000.nc.dods?vas[0][0][0]" rel="nofollow">https://vesg.ipsl.upmc.fr/thredds/dodsC/GeoMIP/output/IPSL/IPSL-CM5A-LR/rcp45/3hr/atmos/3hr/r1i1p1/v20130428/vas/vas_3hr_IPSL-CM5A-LR_rcp45_r1i1p1_200601010300-205601010000.nc.dods?vas[0][0][0]</a></em></p>

<p>I'm trying to automate this process so I don't have to go to the database website and log in. I have tried using the <em>username:password@ above URL</em> approach but I receive an HTML 500 error. So, I'm trying to use a certificate.</p>

<p>Using R.Utils, I entered in the server, username and password of the database. I was able to create what I think is a certificate (called 'C%3A') that should pass along my credentials. 'C%3A' seems to be an HTML file. Is this a certificate containing my credentials? If so;</p>

<p>How do I call this 'certificate' so that the individual URLs that I try to collect the data from know that I have the authorization to download this data?</p>