Update datatransfer.md

removing password instructions and linking to GUI instructions

sn_collections/_guides/datatransfer.md

@@ -63,8 +63,8 @@ The instructional video at [https://www.youtube.com/watch?v=I3lnsCAfx3Q](https:/
 * Click in the ‘Collection’ box on one of the panes. A selection window will appear. Recent collections will be listed under recent tab. Click on other tabs to see collections that you've bookmarked, created or got from other people. In the Recent tab you will also see "Install Globus Connect Personal" button. See below how to install Globus Connect Personal on your computer to transfer data to/from this computer.
 * If you see your desired collection, click it and continue. If you do not see your desired collection start typing the name in the box at the top. When your collection appears, select it.
 * If authentication is required for the selected collection, required fields or other instructions will appear.
-* Type or select “SCINet-Ceres” for Ceres DTN, "SCINet-Atlas" for Atlas DTN or "SCINet-Juno" for Juno. You will be prompted to login.
-* Username is your Ceres username. Your password is your Ceres password **PLUS the six digits generated by Google Authenticator** for access to the Ceres cluster. You would use ‘Password123456’ for the password field where ‘123456’ would be the current code from Google Authenticator and ‘Password’ would be your normal SCINet password.
+* Type or select “SCINet-Ceres” for Ceres DTN, "SCINet-Atlas" for Atlas DTN or "SCINet-Juno" for Juno. You will be prompted to authenticate.
+* You will authenticate with either your LincPass or Login.gov. For more information, see the [GUI Login Instructions]({{ site.baseurl}}/guides/access/gui).
 * To transfer data between Ceres and Atlas clusters, log into Ceres DTN in one pane and to Atlas DTN in the other pane. Similarly, to transfer data to/from Juno, log into NAL TN 0 in one of the panels.
 * Once you have logged in on both panes you will need to navigate to the data you want to copy in one pane (source pane) and navigate to the location you want it copied to on the other pane (destination pane). You can either click on directory names or type the full path in the Path box (under the Collection box).
 * **If you are attempting to access 90 Day Data on Atlas, you will use the following path: /project/90daydata/yourprojectname. If you do not include /project/, you will receieve an error.**