How to connect to an embedded linux target for remote debugging?

I'm trying to debug the "xaos linux example" included with ARM Development Studio on my ODROID-XU4 embedded linux platform. For this purpose, I'm following this tutorial https://developer.arm.com/tools-and-software/embedded/legacy-tools/ds-5-development-studio/resources/tutorials/linux-application-debug-tutorial.  I tried to connect to the odroid device but the user-password window kept popping up no matter how many times I entered the password of my user account. I'm using the target IP address as the hostname in this connection. Also, I configured the odroid device to use sftp connection, what should I do now to establish the connection between my PC and the odroid device?  Note that the tutorial doesn't provide any instruction of how to configure the target platform 

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